1 =head1 web-lib-funcs.pl
3 Common functions for Webmin CGI scripts. This file gets in-directly included
4 by all scripts that use web-lib.pl.
9 ui_print_header(undef, 'My Module', '');
10 print 'This is Webmin version ',get_webmin_version(),'<p>\n';
19 $ipv6_module_error = $@;
21 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
22 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
23 %done_foreign_require $webmin_feedback_address
24 $user_skill_level $pragma_no_cache $foreign_args);
26 use vars qw($module_index_name $number_to_month_map $month_to_number_map
27 $umask_already $default_charset $licence_status $os_type
28 $licence_message $script_name $loaded_theme_oo_library
29 $done_web_lib_funcs $os_version $module_index_link
30 $called_from_webmin_core $ipv6_module_error);
32 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
34 Fill the given hash reference with name=value pairs from a file. The required
37 =item file - The file to head, which must be text with each line like name=value
39 =item hash - The hash reference to add values read from the file to.
41 =item order - If given, an array reference to add names to in the order they were read
43 =item lowercase - If set to 1, names are converted to lower case
45 =item split-char - If set, names and values are split on this character instead of =
51 my $split = defined($_[4]) ? $_[4] : "=";
52 my $realfile = &translate_filename($_[0]);
53 &open_readfile(ARFILE, $_[0]) || return 0;
56 my $hash = index($_, "#");
57 my $eq = index($_, $split);
58 if ($hash != 0 && $eq >= 0) {
59 my $n = substr($_, 0, $eq);
60 my $v = substr($_, $eq+1);
62 $_[1]->{$_[3] ? lc($n) : $n} = $v;
63 push(@{$_[2]}, $n) if ($_[2]);
67 $main::read_file_missing{$realfile} = 0; # It exists now
68 if (defined($main::read_file_cache{$realfile})) {
69 %{$main::read_file_cache{$realfile}} = %{$_[1]};
74 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
76 Like read_file, but reads from an in-memory cache if the file has already been
77 read in this Webmin script. Recommended, as it behaves exactly the same as
78 read_file, but can be much faster.
83 my $realfile = &translate_filename($_[0]);
84 if (defined($main::read_file_cache{$realfile})) {
86 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
89 elsif ($main::read_file_missing{$realfile}) {
90 # Doesn't exist, so don't re-try read
94 # Actually read the file
96 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
97 %{$main::read_file_cache{$realfile}} = %d;
98 %{$_[1]} = ( %{$_[1]}, %d );
102 # Flag as non-existant
103 $main::read_file_missing{$realfile} = 1;
109 =head2 read_file_cached_with_stat(file, &hash, [&order], [lowercase], [split-char])
111 Like read_file, but reads from an in-memory cache if the file has already been
112 read in this Webmin script AND has not changed.
115 sub read_file_cached_with_stat
117 my $realfile = &translate_filename($_[0]);
118 my $t = $main::read_file_cache_time{$realfile};
119 my @st = stat($realfile);
120 if ($t && $st[9] != $t) {
121 # Changed, invalidate cache
122 delete($main::read_file_cache{$realfile});
124 my $rv = &read_file_cached(@_);
125 $main::read_file_cache_time{$realfile} = $st[9];
129 =head2 write_file(file, &hash, [join-char])
131 Write out the contents of a hash as name=value lines. The parameters are :
133 =item file - Full path to write to
135 =item hash - A hash reference containing names and values to output
137 =item join-char - If given, names and values are separated by this instead of =
143 my $join = defined($_[2]) ? $_[2] : "=";
144 my $realfile = &translate_filename($_[0]);
145 &read_file($_[0], \%old, \@order);
146 &open_tempfile(ARFILE, ">$_[0]");
147 foreach $k (@order) {
148 if (exists($_[1]->{$k})) {
149 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
150 &error(&text("efilewrite", $realfile, $!));
153 foreach $k (keys %{$_[1]}) {
154 if (!exists($old{$k})) {
155 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
156 &error(&text("efilewrite", $realfile, $!));
159 &close_tempfile(ARFILE);
160 if (defined($main::read_file_cache{$realfile})) {
161 %{$main::read_file_cache{$realfile}} = %{$_[1]};
163 if (defined($main::read_file_missing{$realfile})) {
164 $main::read_file_missing{$realfile} = 0;
168 =head2 html_escape(string)
170 Converts &, < and > codes in text to HTML entities, and returns the new string.
171 This should be used when including data read from other sources in HTML pages.
180 $tmp =~ s/\"/"/g;
181 $tmp =~ s/\'/'/g;
186 =head2 quote_escape(string, [only-quote])
188 Converts ' and " characters in a string into HTML entities, and returns it.
189 Useful for outputing HTML tag values.
194 my ($tmp, $only) = @_;
195 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
196 # convert &, unless it is part of &#nnn; or &foo;
197 $tmp =~ s/&([^#])/&$1/g;
199 $tmp =~ s/&$/&/g;
200 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
201 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
205 =head2 tempname([filename])
207 Returns a mostly random temporary file name, typically under the /tmp/.webmin
208 directory. If filename is given, this will be the base name used. Otherwise
209 a unique name is selected randomly.
214 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
215 $gconfig{'tempdir_'.&get_module_name()} :
216 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
217 $ENV{'TEMP'} && $ENV{'TEMP'} ne "/tmp" ? $ENV{'TEMP'} :
218 $ENV{'TMP'} && $ENV{'TMP'} ne "/tmp" ? $ENV{'TMP'} :
219 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
220 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
221 "$remote_user_info[7]/.tmp" :
222 @remote_user_info ? $tmp_base."-".$remote_user :
223 $< != 0 ? $tmp_base."-".getpwuid($<) :
225 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
226 # On Windows system, just create temp dir if missing
228 mkdir($tmp_dir, 0755) ||
229 &error("Failed to create temp directory $tmp_dir : $!");
233 # On Unix systems, need to make sure temp dir is valid
235 while($tries++ < 10) {
236 my @st = lstat($tmp_dir);
237 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
239 unlink($tmp_dir) || rmdir($tmp_dir) ||
240 system("/bin/rm -rf ".quotemeta($tmp_dir));
242 mkdir($tmp_dir, 0755) || next;
243 chown($<, $(, $tmp_dir);
244 chmod(0755, $tmp_dir);
247 my @st = lstat($tmp_dir);
248 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
252 if (defined($_[0]) && $_[0] !~ /\.\./) {
253 $rv = "$tmp_dir/$_[0]";
256 $main::tempfilecount++;
258 $rv = $tmp_dir."/".int(rand(1000000))."_".
259 $main::tempfilecount."_".$scriptname;
264 =head2 transname([filename])
266 Behaves exactly like tempname, but records the temp file for deletion when the
267 current Webmin script process exits.
272 my $rv = &tempname(@_);
273 push(@main::temporary_files, $rv);
277 =head2 trunc(string, maxlen)
279 Truncates a string to the shortest whole word less than or equal to the
280 given width. Useful for word wrapping.
285 if (length($_[0]) <= $_[1]) {
288 my $str = substr($_[0],0,$_[1]);
297 =head2 indexof(string, value, ...)
299 Returns the index of some value in an array of values, or -1 if it was not
305 for(my $i=1; $i <= $#_; $i++) {
306 if ($_[$i] eq $_[0]) { return $i - 1; }
311 =head2 indexoflc(string, value, ...)
313 Like indexof, but does a case-insensitive match
318 my $str = lc(shift(@_));
319 my @arr = map { lc($_) } @_;
320 return &indexof($str, @arr);
323 =head2 sysprint(handle, [string]+)
325 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
326 as a replacement for print when writing to pipes or sockets.
331 my $fh = &callers_package($_[0]);
332 my $str = join('', @_[1..$#_]);
333 syswrite $fh, $str, length($str);
336 =head2 check_ipaddress(ip)
338 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
343 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
344 $1 >= 0 && $1 <= 255 &&
345 $2 >= 0 && $2 <= 255 &&
346 $3 >= 0 && $3 <= 255 &&
347 $4 >= 0 && $4 <= 255;
350 =head2 check_ip6address(ip)
352 Check if some IPv6 address is properly formatted, and returns 1 if so.
357 my @blocks = split(/:/, $_[0]);
358 return 0 if (@blocks == 0 || @blocks > 8);
360 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
361 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
362 # value is in [0;128].
364 my $where = index($blocks[$ib],"/");
367 my $b = substr($blocks[$ib],0,$where);
368 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
372 # The netmask must take its value in [0;128]
373 return 0 if ($m <0 || $m >128);
375 # Check the different blocks of the address : 16 bits block in hexa notation.
376 # Possibility of 1 empty block or 2 if the address begins with "::".
379 foreach $b (@blocks) {
380 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
381 $empty++ if ($b eq "");
383 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
389 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
391 Prints HTML for an icon image. The parameters are :
393 =item image - URL for the image, like images/foo.gif
395 =item title - Text to appear under the icon
397 =item link - Optional destination for the icon's link
399 =item href - Other HTML attributes to be added to the <a href> for the link
401 =item width - Optional width of the icon
403 =item height - Optional height of the icon
405 =item before-title - HTML to appear before the title link, but which is not actually in the link
407 =item after-title - HTML to appear after the title link, but which is not actually in the link
412 &load_theme_library();
413 if (defined(&theme_generate_icon)) {
414 &theme_generate_icon(@_);
417 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
418 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
419 if ($tconfig{'noicons'}) {
421 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
424 print "$_[6]$_[1]$_[7]\n";
428 print "<table border><tr><td width=48 height=48>\n",
429 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
430 "$w $h></a></td></tr></table>\n";
431 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
434 print "<table border><tr><td width=48 height=48>\n",
435 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
436 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
442 Converts a string to a form ok for putting in a URL, using % escaping.
448 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
452 =head2 un_urlize(string)
454 Converts a URL-encoded string to it's original contents - the reverse of the
462 $rv =~ s/%(..)/pack("c",hex($1))/ge;
466 =head2 include(filename)
468 Read and output the contents of the given file.
474 open(INCLUDE, &translate_filename($_[0])) || return 0;
482 =head2 copydata(in-handle, out-handle)
484 Read from one file handle and write to another, until there is no more to read.
490 $in = &callers_package($in);
491 $out = &callers_package($out);
493 while(read($in, $buf, 1024) > 0) {
494 (print $out $buf) || return 0;
499 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
501 Read data submitted via a POST request using the multipart/form-data coding,
502 and store it in the global %in hash. The optional parameters are :
504 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
506 =item cbfunc - A function reference to call after reading each block of data.
508 =item cbargs - Additional parameters to the callback function.
513 my ($max, $cbfunc, $cbargs) = @_;
514 my ($boundary, $line, $foo, $name, $got, $file);
515 my $err = &text('readparse_max', $max);
516 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
517 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
520 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
522 <STDIN>; # skip first boundary
525 # Read section headers
529 $got += length($line);
530 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
531 if ($max && $got > $max) {
536 if ($line =~ /^(\S+):\s*(.*)$/) {
537 $header{$lastheader = lc($1)} = $2;
539 elsif ($line =~ /^\s+(.*)$/) {
540 $header{$lastheader} .= $line;
544 # Parse out filename and type
545 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
547 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
552 $foo = $name . "_$1";
559 &error($text{'readparse_cdheader'});
561 if ($header{'content-type'} =~ /^([^\s;]+)/) {
562 $foo = $name . "_content_type";
565 $file = $in{$name."_filename"};
568 $in{$name} .= "\0" if (defined($in{$name}));
571 $got += length($line);
572 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
574 if ($max && $got > $max) {
575 #print STDERR "over limit of $max\n";
580 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
585 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
586 if (index($line, $boundary) != -1) { last; }
589 chop($in{$name}); chop($in{$name});
590 if (index($line,"$boundary--") != -1) { last; }
592 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
595 =head2 ReadParse([&hash], [method], [noplus])
597 Fills the given hash reference with CGI parameters, or uses the global hash
598 %in if none is given. Also sets the global variables $in and @in. The other
601 =item method - For use of this HTTP method, such as GET
603 =item noplus - Don't convert + in parameters to spaces.
608 my $a = $_[0] || \%in;
610 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
612 if ($meth eq 'POST') {
613 my $clen = $ENV{'CONTENT_LENGTH'};
614 &read_fully(STDIN, \$in, $clen) == $clen ||
615 &error("Failed to read POST input : $!");
617 if ($ENV{'QUERY_STRING'}) {
618 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
619 else { $in = $ENV{'QUERY_STRING'}; }
621 @in = split(/\&/, $in);
622 foreach my $i (@in) {
623 my ($k, $v) = split(/=/, $i, 2);
628 $k =~ s/%(..)/pack("c",hex($1))/ge;
629 $v =~ s/%(..)/pack("c",hex($1))/ge;
630 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
634 =head2 read_fully(fh, &buffer, length)
636 Read data from some file handle up to the given length, even in the face
637 of partial reads. Reads the number of bytes read. Stores received data in the
638 string pointed to be the buffer reference.
643 my ($fh, $buf, $len) = @_;
644 $fh = &callers_package($fh);
647 my $r = read(STDIN, $$buf, $len-$got, $got);
654 =head2 read_parse_mime_callback(size, totalsize, upload-id)
656 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
657 the file on every 1% change though. For internal use by the upload progress
661 sub read_parse_mime_callback
663 my ($size, $totalsize, $filename, $id) = @_;
664 return if ($gconfig{'no_upload_tracker'});
667 # Create the upload tracking directory - if running as non-root, this has to
668 # be under the user's home
671 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
672 $vardir = "$uinfo[7]/.tmp";
675 $vardir = $ENV{'WEBMIN_VAR'};
678 &make_dir($vardir, 0755);
681 # Remove any upload.* files more than 1 hour old
682 if (!$main::read_parse_mime_callback_flushed) {
684 opendir(UPDIR, $vardir);
685 foreach my $f (readdir(UPDIR)) {
686 next if ($f !~ /^upload\./);
687 my @st = stat("$vardir/$f");
688 if ($st[9] < $now-3600) {
689 unlink("$vardir/$f");
693 $main::read_parse_mime_callback_flushed++;
696 # Only update file once per percent
697 my $upfile = "$vardir/upload.$id";
698 if ($totalsize && $size >= 0) {
699 my $pc = int(100 * $size / $totalsize);
700 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
703 $main::read_parse_mime_callback_pc{$upfile} = $pc;
707 &open_tempfile(UPFILE, ">$upfile");
708 print UPFILE $size,"\n";
709 print UPFILE $totalsize,"\n";
710 print UPFILE $filename,"\n";
711 &close_tempfile(UPFILE);
714 =head2 read_parse_mime_javascript(upload-id, [&fields])
716 Returns an onSubmit= Javascript statement to popup a window for tracking
717 an upload with the given ID. For internal use by the upload progress tracker.
720 sub read_parse_mime_javascript
722 my ($id, $fields) = @_;
723 return "" if ($gconfig{'no_upload_tracker'});
724 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
726 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
727 return "onSubmit='if ($if) { $opener }'";
730 return "onSubmit='$opener'";
734 =head2 PrintHeader(charset)
736 Outputs the HTTP headers for an HTML page. The optional charset parameter
737 can be used to set a character set. Normally this function is not called
738 directly, but is rather called by ui_print_header or header.
743 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
744 print "pragma: no-cache\n";
745 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
746 print "Cache-Control: no-store, no-cache, must-revalidate\n";
747 print "Cache-Control: post-check=0, pre-check=0\n";
749 if (defined($_[0])) {
750 print "Content-type: text/html; Charset=$_[0]\n\n";
753 print "Content-type: text/html\n\n";
757 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
759 Outputs a Webmin HTML page header with a title, including HTTP headers. The
762 =item title - The text to show at the top of the page
764 =item image - An image to show instead of the title text. This is typically left blank.
766 =item help - If set, this is the name of a help page that will be linked to in the title.
768 =item config - If set to 1, the title will contain a link to the module's config page.
770 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
772 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
774 =item rightside - HTML to be shown on the right-hand side of the title. Can contain multiple lines, separated by <br>. Typically this is used for links to stop, start or restart servers.
776 =item head-stuff - HTML to be included in the <head> section of the page.
778 =item body-stuff - HTML attributes to be include in the <body> tag.
780 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
785 return if ($main::done_webmin_header++);
787 my $charset = defined($main::force_charset) ? $main::force_charset
789 &PrintHeader($charset);
790 &load_theme_library();
791 if (defined(&theme_header)) {
792 $module_name = &get_module_name();
794 $miniserv::page_capture = 1;
797 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
800 if (defined(&theme_prehead)) {
804 print "<meta http-equiv=\"Content-Type\" ",
805 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
808 my $title = &get_html_title($_[0]);
809 print "<title>$title</title>\n";
810 print $_[7] if ($_[7]);
811 print &get_html_status_line(0);
813 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
814 if ($tconfig{'headinclude'}) {
815 print &read_file_contents(
816 "$theme_root_directory/$tconfig{'headinclude'}");
819 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
820 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
821 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
822 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
823 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
824 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
825 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
827 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
829 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
830 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
831 if (defined(&theme_prebody)) {
834 my $hostname = &get_display_hostname();
835 my $version = &get_webmin_version();
836 my $prebody = $tconfig{'prebody'};
838 $prebody =~ s/%HOSTNAME%/$hostname/g;
839 $prebody =~ s/%VERSION%/$version/g;
840 $prebody =~ s/%USER%/$remote_user/g;
841 $prebody =~ s/%OS%/$os_type $os_version/g;
844 if ($tconfig{'prebodyinclude'}) {
846 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
853 print $tconfig{'preheader'};
854 my %this_module_info = &get_module_info(&get_module_name());
855 print "<table class='header' width=100%><tr>\n";
856 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
857 print "<td id='headln1' colspan=3 align=center>\n";
858 print &get_html_status_line(1);
859 print "</td></tr> <tr>\n";
861 print "<td id='headln2l' width=15% valign=top align=left>";
862 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
863 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
864 "$text{'header_servers'}</a><br>\n";
866 if (!$_[5] && !$tconfig{'noindex'}) {
867 my @avail = &get_available_module_infos(1);
868 my $nolo = $ENV{'ANONYMOUS_USER'} ||
869 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
870 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
871 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
873 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
874 "$text{'main_logout'}</a><br>";
876 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
877 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
878 "$text{'main_switch'}</a><br>";
880 elsif (!$gconfig{'gotoone'} || @avail > 1) {
881 print "<a href='$gconfig{'webprefix'}/?cat=",
882 $this_module_info{'category'},
883 "'>$text{'header_webmin'}</a><br>\n";
886 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
887 my $idx = $this_module_info{'index_link'};
888 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
889 my $mt = $module_index_name || $text{'header_module'};
890 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
892 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
893 !$tconfig{'nohelp'}) {
894 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
897 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
898 !$tconfig{'nohelp'}) {
899 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
902 my %access = &get_module_acl();
903 if (!$access{'noconfig'} && !$config{'noprefs'}) {
904 my $cprog = $user_module_config_directory ?
905 "uconfig.cgi" : "config.cgi";
906 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
907 &get_module_name()."\">",
908 $text{'header_config'},"</a><br>\n";
913 # Title is a single image
914 print "<td id='headln2c' align=center width=70%>",
915 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
919 my $ts = defined($tconfig{'titlesize'}) ?
920 $tconfig{'titlesize'} : "+2";
921 print "<td id='headln2c' align=center width=70%>",
922 ($ts ? "<font size=$ts>" : ""),$_[0],
923 ($ts ? "</font>" : "");
924 print "<br>$_[9]\n" if ($_[9]);
927 print "<td id='headln2r' width=15% valign=top align=right>";
929 print "</td></tr></table>\n";
930 print $tconfig{'postheader'};
932 $miniserv::page_capture = 1;
935 =head2 get_html_title(title)
937 Returns the full string to appear in the HTML <title> block.
944 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
945 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
946 my $host = &get_display_hostname();
947 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
948 $title = sprintf "%s : %s on %s (%s %s)\n",
949 $msg, $remote_user, $host,
950 $os_type, $os_version;
952 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
953 $title = sprintf "%s on %s (%s %s)\n",
955 $os_type, $os_version;
960 if ($gconfig{'showlogin'} && $remote_user) {
961 $title = $remote_user.($title ? " : ".$title : "");
963 if ($gconfig{'showhost'}) {
964 $title = $host.($title ? " : ".$title : "");
969 =head2 get_html_framed_title
971 Returns the title text for a framed theme main page.
974 sub get_html_framed_title
977 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
978 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
980 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
981 # Alternate title mode requested
982 $title = sprintf "%s on %s (%s %s)\n",
983 $remote_user, &get_display_hostname(),
984 $os_type, $os_version;
987 # Title like 'Webmin x.yy on hostname (Linux 6)'
988 if ($os_version eq "*") {
992 $ostr = "$os_type $os_version";
994 my $host = &get_display_hostname();
995 my $ver = &get_webmin_version();
996 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
997 $gconfig{'showhost'} ? &text('main_title3', $ver, $ostr) :
998 &text('main_title', $ver, $host, $ostr);
999 if ($gconfig{'showlogin'}) {
1000 $title = $remote_user.($title ? " : ".$title : "");
1002 if ($gconfig{'showhost'}) {
1003 $title = $host.($title ? " : ".$title : "");
1009 =head2 get_html_status_line(text-only)
1011 Returns HTML for a script block that sets the status line, or if text-only
1012 is set to 1, just return the status line text.
1015 sub get_html_status_line
1017 my ($textonly) = @_;
1018 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
1019 # Disabled in this mode
1022 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
1023 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
1024 my $line = &text('header_statusmsg',
1025 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
1027 ($ENV{'SSL_USER'} ? " (SSL certified)" :
1028 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1029 $text{'programname'},
1030 &get_webmin_version(),
1031 &get_display_hostname(),
1032 $os_type.($os_version eq "*" ? "" :" $os_version"));
1037 $line =~ s/\r|\n//g;
1038 return "<script language=JavaScript type=text/javascript>\n".
1039 "defaultStatus=\""."e_escape($line)."\";\n".
1044 =head2 popup_header([title], [head-stuff], [body-stuff], [no-body])
1046 Outputs a page header, suitable for a popup window. If no title is given,
1047 absolutely no decorations are output. Also useful in framesets. The parameters
1050 =item title - Title text for the popup window.
1052 =item head-stuff - HTML to appear in the <head> section.
1054 =item body-stuff - HTML attributes to be include in the <body> tag.
1056 =item no-body - If set to 1, don't generate a body tag
1061 return if ($main::done_webmin_header++);
1063 my $charset = defined($main::force_charset) ? $main::force_charset
1065 &PrintHeader($charset);
1066 &load_theme_library();
1067 if (defined(&theme_popup_header)) {
1068 &theme_popup_header(@_);
1069 $miniserv::page_capture = 1;
1072 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1075 if (defined(&theme_popup_prehead)) {
1076 &theme_popup_prehead(@_);
1078 print "<title>$_[0]</title>\n";
1080 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1081 if ($tconfig{'headinclude'}) {
1082 print &read_file_contents(
1083 "$theme_root_directory/$tconfig{'headinclude'}");
1086 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1087 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1088 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1089 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1090 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1091 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1092 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1095 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1096 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1097 if (defined(&theme_popup_prebody)) {
1098 &theme_popup_prebody(@_);
1101 $miniserv::page_capture = 1;
1104 =head2 footer([page, name]+, [noendbody])
1106 Outputs the footer for a Webmin HTML page, possibly with links back to other
1107 pages. The links are specified by pairs of parameters, the first of which is
1108 a link destination, and the second the link text. For example :
1110 footer('/', 'Webmin index', '', 'Module menu');
1115 $miniserv::page_capture = 0;
1116 &load_theme_library();
1117 my %this_module_info = &get_module_info(&get_module_name());
1118 if (defined(&theme_footer)) {
1119 $module_name = &get_module_name(); # Old themes use these
1120 %module_info = %this_module_info;
1124 for(my $i=0; $i+1<@_; $i+=2) {
1126 if ($url ne '/' || !$tconfig{'noindex'}) {
1128 $url = "/?cat=$this_module_info{'category'}";
1130 elsif ($url eq '' && &get_module_name()) {
1131 $url = "/".&get_module_name()."/".
1132 $this_module_info{'index_link'};
1134 elsif ($url =~ /^\?/ && &get_module_name()) {
1135 $url = "/".&get_module_name()."/$url";
1137 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1139 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1144 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1149 my $postbody = $tconfig{'postbody'};
1151 my $hostname = &get_display_hostname();
1152 my $version = &get_webmin_version();
1153 my $os_type = $gconfig{'real_os_type'} ||
1154 $gconfig{'os_type'};
1155 my $os_version = $gconfig{'real_os_version'} ||
1156 $gconfig{'os_version'};
1157 $postbody =~ s/%HOSTNAME%/$hostname/g;
1158 $postbody =~ s/%VERSION%/$version/g;
1159 $postbody =~ s/%USER%/$remote_user/g;
1160 $postbody =~ s/%OS%/$os_type $os_version/g;
1161 print "$postbody\n";
1163 if ($tconfig{'postbodyinclude'}) {
1165 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1171 if (defined(&theme_postbody)) {
1172 &theme_postbody(@_);
1174 print "</body></html>\n";
1178 =head2 popup_footer([no-body])
1180 Outputs html for a footer for a popup window, started by popup_header.
1185 $miniserv::page_capture = 0;
1186 &load_theme_library();
1187 if (defined(&theme_popup_footer)) {
1188 &theme_popup_footer(@_);
1197 =head2 load_theme_library
1199 Immediately loads the current theme's theme.pl file. Not generally useful for
1200 most module developers, as this is called automatically by the header function.
1203 sub load_theme_library
1205 return if (!$current_theme || $loaded_theme_library++);
1206 for(my $i=0; $i<@theme_root_directories; $i++) {
1207 if ($theme_configs[$i]->{'functions'}) {
1208 do $theme_root_directories[$i]."/".
1209 $theme_configs[$i]->{'functions'};
1214 =head2 redirect(url)
1216 Output HTTP headers to redirect the browser to some page. The url parameter is
1217 typically a relative URL like index.cgi or list_users.cgi.
1222 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1223 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1224 ":$ENV{'SERVER_PORT'}";
1225 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1226 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1228 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1229 # Absolute URL (like http://...)
1232 elsif ($_[0] =~ /^\//) {
1233 # Absolute path (like /foo/bar.cgi)
1234 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1236 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1237 # Relative URL (like foo.cgi)
1238 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1241 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1243 &load_theme_library();
1244 if (defined(&theme_redirect)) {
1245 $module_name = &get_module_name(); # Old themes use these
1246 %module_info = &get_module_info($module_name);
1247 &theme_redirect($_[0], $url);
1250 print "Location: $url\n\n";
1254 =head2 kill_byname(name, signal)
1256 Finds a process whose command line contains the given name (such as httpd), and
1257 sends some signal to it. The signal can be numeric (like 9) or named
1263 my @pids = &find_byname($_[0]);
1264 return scalar(@pids) if (&is_readonly_mode());
1265 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1266 if ($gconfig{'debug_what_procs'});
1267 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1271 =head2 kill_byname_logged(name, signal)
1273 Like kill_byname, but also logs the killing.
1276 sub kill_byname_logged
1278 my @pids = &find_byname($_[0]);
1279 return scalar(@pids) if (&is_readonly_mode());
1280 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1284 =head2 find_byname(name)
1286 Finds processes searching for the given name in their command lines, and
1287 returns a list of matching PIDs.
1292 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1293 # Linux with /proc filesystem .. use cmdline files, as this is
1294 # faster than forking
1296 opendir(PROCDIR, "/proc");
1297 foreach my $f (readdir(PROCDIR)) {
1298 if ($f eq int($f) && $f != $$) {
1299 my $line = &read_file_contents("/proc/$f/cmdline");
1300 if ($line =~ /$_[0]/) {
1309 if (&foreign_check("proc")) {
1310 # Call the proc module
1311 &foreign_require("proc", "proc-lib.pl");
1312 if (defined(&proc::list_processes)) {
1313 my @procs = &proc::list_processes();
1315 foreach my $p (@procs) {
1316 if ($p->{'args'} =~ /$_[0]/) {
1317 push(@pids, $p->{'pid'});
1320 @pids = grep { $_ != $$ } @pids;
1325 # Fall back to running a command
1327 $cmd = $gconfig{'find_pid_command'};
1328 $cmd =~ s/NAME/"$_[0]"/g;
1329 $cmd = &translate_command($cmd);
1330 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1331 @pids = grep { $_ != $$ } @pids;
1335 =head2 error([message]+)
1337 Display an error message and exit. This should be used by CGI scripts that
1338 encounter a fatal error or invalid user input to notify users of the problem.
1339 If error_setup has been called, the displayed error message will be prefixed
1340 by the message setup using that function.
1345 $main::no_miniserv_userdb = 1;
1346 my $msg = join("", @_);
1347 $msg =~ s/<[^>]*>//g;
1348 if (!$main::error_must_die) {
1349 print STDERR "Error: ",$msg,"\n";
1351 &load_theme_library();
1352 if ($main::error_must_die) {
1353 if ($gconfig{'error_stack'}) {
1354 print STDERR "Error: ",$msg,"\n";
1355 for(my $i=0; my @stack = caller($i); $i++) {
1356 print STDERR "File: $stack[1] Line: $stack[2] ",
1357 "Function: $stack[3]\n";
1362 elsif (!$ENV{'REQUEST_METHOD'}) {
1363 # Show text-only error
1364 print STDERR "$text{'error'}\n";
1365 print STDERR "-----\n";
1366 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1368 print STDERR "-----\n";
1369 if ($gconfig{'error_stack'}) {
1371 print STDERR $text{'error_stack'},"\n";
1372 for(my $i=0; my @stack = caller($i); $i++) {
1373 print STDERR &text('error_stackline',
1374 $stack[1], $stack[2], $stack[3]),"\n";
1379 elsif (defined(&theme_error)) {
1383 &header($text{'error'}, "");
1385 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1387 if ($gconfig{'error_stack'}) {
1389 print "<h3>$text{'error_stack'}</h3>\n";
1391 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1392 "<td><b>$text{'error_line'}</b></td> ",
1393 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1394 for($i=0; my @stack = caller($i); $i++) {
1396 print "<td>$stack[1]</td>\n";
1397 print "<td>$stack[2]</td>\n";
1398 print "<td>$stack[3]</td>\n";
1404 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1405 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1411 &unlock_all_files();
1412 &cleanup_tempnames();
1416 =head2 popup_error([message]+)
1418 This function is almost identical to error, but displays the message with HTML
1419 headers suitable for a popup window.
1424 $main::no_miniserv_userdb = 1;
1425 &load_theme_library();
1426 if ($main::error_must_die) {
1429 elsif (defined(&theme_popup_error)) {
1430 &theme_popup_error(@_);
1433 &popup_header($text{'error'}, "");
1434 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1437 &unlock_all_files();
1438 &cleanup_tempnames();
1442 =head2 error_setup(message)
1444 Registers a message to be prepended to all error messages displayed by the
1450 $main::whatfailed = $_[0];
1453 =head2 wait_for(handle, regexp, regexp, ...)
1455 Reads from the input stream until one of the regexps matches, and returns the
1456 index of the matching regexp, or -1 if input ended before any matched. This is
1457 very useful for parsing the output of interactive programs, and can be used with
1458 a two-way pipe to feed input to a program in response to output matched by
1461 If the matching regexp contains bracketed sub-expressions, their values will
1462 be placed in the global array @matches, indexed starting from 1. You cannot
1463 use the Perl variables $1, $2 and so on to capture matches.
1467 $rv = wait_for($loginfh, "username:");
1469 error("Didn't get username prompt");
1471 print $loginfh "joe\n";
1472 $rv = wait_for($loginfh, "password:");
1474 error("Didn't get password prompt");
1476 print $loginfh "smeg\n";
1481 my ($c, $i, $sw, $rv, $ha);
1482 undef($wait_for_input);
1483 if ($wait_for_debug) {
1484 print STDERR "wait_for(",join(",", @_),")\n";
1486 $ha = &callers_package($_[0]);
1487 if ($wait_for_debug) {
1488 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1493 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1494 " \$wait_for_input .= \$c;\n";
1495 if ($wait_for_debug) {
1496 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1498 for($i=1; $i<@_; $i++) {
1499 $sw = $i>1 ? "elsif" : "if";
1500 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1503 " if (defined(\$hit)) {\n".
1504 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1510 &error("wait_for error : $@\n");
1515 =head2 fast_wait_for(handle, string, string, ...)
1517 This function behaves very similar to wait_for (documented above), but instead
1518 of taking regular expressions as parameters, it takes strings. As soon as the
1519 input contains one of them, it will return the index of the matching string.
1520 If the input ends before any match, it returns -1.
1525 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1526 for($i=1; $i<@_; $i++) {
1527 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1531 if (($c = getc($ha)) eq "") {
1532 &error("fast_wait_for read error : $!");
1535 if (length($inp) > $maxlen) {
1536 $inp = substr($inp, length($inp)-$maxlen);
1538 $inpl = length($inp);
1539 for($i=1; $i<@_; $i++) {
1540 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1547 =head2 has_command(command)
1549 Returns the full path to the executable if some command is in the path, or
1550 undef if not found. If the given command is already an absolute path and
1551 exists, then the same path will be returned.
1556 if (!$_[0]) { return undef; }
1557 if (exists($main::has_command_cache{$_[0]})) {
1558 return $main::has_command_cache{$_[0]};
1561 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1562 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1563 # Absolute path given - just use it
1564 my $t = &translate_filename($_[0]);
1565 $rv = (-x $t && !-d _) ? $_[0] : undef;
1568 # Check each directory in the path
1570 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1571 next if ($donedir{$d}++);
1572 $d =~ s/$slash$// if ($d ne $slash);
1573 my $t = &translate_filename("$d/$_[0]");
1574 if (-x $t && !-d _) {
1575 $rv = $d.$slash.$_[0];
1578 if ($gconfig{'os_type'} eq 'windows') {
1579 foreach my $sfx (".exe", ".com", ".bat") {
1580 my $t = &translate_filename("$d/$_[0]").$sfx;
1581 if (-r $t && !-d _) {
1582 $rv = $d.$slash.$_[0].$sfx;
1589 $main::has_command_cache{$_[0]} = $rv;
1593 =head2 make_date(seconds, [date-only], [fmt])
1595 Converts a Unix date/time in seconds to a human-readable form, by default
1596 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1598 =item seconds - Unix time is seconds to convert.
1600 =item date-only - If set to 1, exclude the time from the returned string.
1602 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1607 my ($secs, $only, $fmt) = @_;
1608 my @tm = localtime($secs);
1611 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1613 if ($fmt eq 'dd/mon/yyyy') {
1614 $date = sprintf "%2.2d/%s/%4.4d",
1615 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1617 elsif ($fmt eq 'dd/mm/yyyy') {
1618 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1620 elsif ($fmt eq 'mm/dd/yyyy') {
1621 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1623 elsif ($fmt eq 'yyyy/mm/dd') {
1624 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1626 elsif ($fmt eq 'd. mon yyyy') {
1627 $date = sprintf "%d. %s %4.4d",
1628 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1630 elsif ($fmt eq 'dd.mm.yyyy') {
1631 $date = sprintf "%2.2d.%2.2d.%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1633 elsif ($fmt eq 'yyyy-mm-dd') {
1634 $date = sprintf "%4.4d-%2.2d-%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1637 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1642 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1644 Return HTML for a button that pops up a file chooser when clicked, and places
1645 the selected filename into another HTML field. The parameters are :
1647 =item input - Name of the form field to store the filename in.
1649 =item type - 0 for file or directory chooser, or 1 for directory only.
1651 =item form - Index of the form containing the button.
1653 =item chroot - If set to 1, the chooser will be limited to this directory.
1655 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1658 sub file_chooser_button
1660 return &theme_file_chooser_button(@_)
1661 if (defined(&theme_file_chooser_button));
1662 my $form = defined($_[2]) ? $_[2] : 0;
1663 my $chroot = defined($_[3]) ? $_[3] : "/";
1664 my $add = int($_[4]);
1665 my ($w, $h) = (400, 300);
1666 if ($gconfig{'db_sizefile'}) {
1667 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1669 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/chooser.cgi?add=$add&type=$_[1]&chroot=$chroot&file=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=no,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
1672 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1674 Returns HTML for a button that will popup a chooser window of some kind. The
1677 =item url - Base URL of the popup window's contents
1679 =item width - Width of the window in pixels
1681 =item height - Height in pixels
1683 =item scrollbars - Set to 1 if the window should have scrollbars
1685 The field-mappings parameter is an array ref of array refs containing
1687 =item - Attribute to assign field to in the popup window
1689 =item - Form field name
1691 =item - CGI parameter to URL for value, if any
1694 sub popup_window_button
1696 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1697 my ($url, $w, $h, $scroll, $fields) = @_;
1698 my $scrollyn = $scroll ? "yes" : "no";
1699 my $rv = "<input type=button onClick='";
1700 foreach my $m (@$fields) {
1701 $rv .= "$m->[0] = form.$m->[1]; ";
1703 my $sep = $url =~ /\?/ ? "&" : "?";
1704 $rv .= "chooser = window.open(\"$url\"";
1705 foreach my $m (@$fields) {
1707 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1711 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1712 foreach my $m (@$fields) {
1713 $rv .= "chooser.$m->[0] = $m->[0]; ";
1714 $rv .= "window.$m->[0] = $m->[0]; ";
1716 $rv .= "' value=\"...\">";
1720 =head2 read_acl(&user-module-hash, &user-list-hash, [&only-users])
1722 Reads the Webmin acl file into the given hash references. The first is indexed
1723 by a combined key of username,module , with the value being set to 1 when
1724 the user has access to that module. The second is indexed by username, with
1725 the value being an array ref of allowed modules.
1727 This function is deprecated in favour of foreign_available, which performs a
1728 more comprehensive check of module availability.
1730 If the only-users array ref parameter is given, the results may be limited to
1731 users in that list of names.
1736 my ($usermod, $userlist, $only) = @_;
1737 if (!%main::acl_hash_cache) {
1738 # Read from local files
1740 open(ACL, &acl_filename());
1742 if (/^([^:]+):\s*(.*)/) {
1744 my @mods = split(/\s+/, $2);
1745 foreach my $m (@mods) {
1746 $main::acl_hash_cache{$user,$m}++;
1748 $main::acl_array_cache{$user} = \@mods;
1753 %$usermod = %main::acl_hash_cache if ($usermod);
1754 %$userlist = %main::acl_array_cache if ($userlist);
1757 my $userdb = &get_userdb_string();
1758 my ($dbh, $proto, $prefix, $args) =
1759 $userdb ? &connect_userdb($userdb) : ( );
1761 if ($proto eq "mysql" || $proto eq "postgresql") {
1762 # Select usernames and modules from SQL DB
1763 my $cmd = $dbh->prepare(
1764 "select webmin_user.name,webmin_user_attr.value ".
1765 "from webmin_user,webmin_user_attr ".
1766 "where webmin_user.id = webmin_user_attr.id ".
1767 "and webmin_user_attr.attr = 'modules' ".
1768 ($only ? " and webmin_user.name in (".
1769 join(",", map { "'$_'" } @$only).")" : ""));
1770 if ($cmd && $cmd->execute()) {
1771 while(my ($user, $mods) = $cmd->fetchrow()) {
1772 my @mods = split(/\s+/, $mods);
1773 foreach my $m (@mods) {
1774 $usermod->{$user,$m}++ if ($usermod);
1776 $userlist->{$user} = \@mods if ($userlist);
1779 $cmd->finish() if ($cmd);
1781 elsif ($proto eq "ldap") {
1782 # Find users in LDAP
1783 my $filter = '(objectClass='.$args->{'userclass'}.')';
1786 "(|".join("", map { "(cn=$_)" } @$only).")";
1787 $filter = "(&".$filter.$ufilter.")";
1789 my $rv = $dbh->search(
1793 attrs => [ 'cn', 'webminModule' ]);
1794 if ($rv && !$rv->code) {
1795 foreach my $u ($rv->all_entries) {
1796 my $user = $u->get_value('cn');
1797 my @mods =$u->get_value('webminModule');
1798 foreach my $m (@mods) {
1799 $usermod->{$user,$m}++ if ($usermod);
1801 $userlist->{$user} = \@mods if ($userlist);
1805 &disconnect_userdb($userdb, $dbh);
1811 Returns the file containing the webmin ACL, which is usually
1812 /etc/webmin/webmin.acl.
1817 return "$config_directory/webmin.acl";
1822 Does nothing, but kept around for compatability.
1829 =head2 get_miniserv_config(&hash)
1831 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1832 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1836 sub get_miniserv_config
1838 return &read_file_cached(
1839 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1842 =head2 put_miniserv_config(&hash)
1844 Writes out the Webmin webserver configuration file from the contents of
1845 the given hash ref. This should be initially populated by get_miniserv_config,
1848 get_miniserv_config(\%miniserv);
1849 $miniserv{'port'} = 10005;
1850 put_miniserv_config(\%miniserv);
1854 sub put_miniserv_config
1856 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1860 =head2 restart_miniserv([nowait])
1862 Kill the old miniserv process and re-start it, then optionally waits for
1863 it to restart. This will apply all configuration settings.
1866 sub restart_miniserv
1869 return undef if (&is_readonly_mode());
1871 &get_miniserv_config(\%miniserv) || return;
1872 if ($main::webmin_script_type eq 'web' && !$ENV{"MINISERV_CONFIG"}) {
1873 # Running under some web server other than miniserv, so do nothing
1878 if ($gconfig{'os_type'} ne 'windows') {
1879 # On Unix systems, we can restart with a signal
1880 my ($pid, $addr, $i);
1881 $miniserv{'inetd'} && return;
1882 my @oldst = stat($miniserv{'pidfile'});
1883 $pid = $ENV{'MINISERV_PID'};
1885 if (!open(PID, $miniserv{'pidfile'})) {
1886 print STDERR "PID file $miniserv{'pidfile'} does ",
1893 print STDERR "Invalid PID file $miniserv{'pidfile'}\n";
1896 if (!kill(0, $pid)) {
1897 print STDERR "PID $pid from file $miniserv{'pidfile'} ",
1903 # Just signal miniserv to restart
1904 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1906 # Wait till new PID is written, indicating a restart
1907 for($i=0; $i<60; $i++) {
1909 my @newst = stat($miniserv{'pidfile'});
1910 last if ($newst[9] != $oldst[9]);
1912 $i < 60 || &error("Webmin server did not write new PID file");
1914 ## Totally kill the process and re-run it
1915 #$SIG{'TERM'} = 'IGNORE';
1916 #&kill_logged('TERM', $pid);
1917 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1920 # On Windows, we need to use the flag file
1921 open(TOUCH, ">$miniserv{'restartflag'}");
1926 # Wait for miniserv to come back up
1927 my $addr = $miniserv{'bind'} || "127.0.0.1";
1929 for($i=0; $i<20; $i++) {
1932 &open_socket($addr, $miniserv{'port'}, STEST, \$err);
1934 last if (!$err && ++$ok >= 2);
1936 $i < 20 || &error("Failed to restart Webmin server!");
1940 =head2 reload_miniserv
1942 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1943 configuration files. Not all changes will be applied though, such as the
1944 IP addresses and ports to accept connections on.
1949 return undef if (&is_readonly_mode());
1951 &get_miniserv_config(\%miniserv) || return;
1952 if ($main::webmin_script_type eq 'web' && !$ENV{"MINISERV_CONFIG"}) {
1953 # Running under some web server other than miniserv, so do nothing
1957 if ($gconfig{'os_type'} ne 'windows') {
1958 # Send a USR1 signal to re-read the config
1959 my ($pid, $addr, $i);
1960 $miniserv{'inetd'} && return;
1961 $pid = $ENV{'MINISERV_PID'};
1963 if (!open(PID, $miniserv{'pidfile'})) {
1964 print STDERR "PID file $miniserv{'pidfile'} does ",
1971 print STDERR "Invalid PID file $miniserv{'pidfile'}\n";
1974 if (!kill(0, $pid)) {
1975 print STDERR "PID $pid from file $miniserv{'pidfile'} ",
1980 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1982 # Make sure this didn't kill Webmin!
1984 if (!kill(0, $pid)) {
1985 print STDERR "USR1 signal killed Webmin - restarting\n";
1986 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1990 # On Windows, we need to use the flag file
1991 open(TOUCH, ">$miniserv{'reloadflag'}");
1996 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1998 Returns 1 if some module is supported on the current operating system, or the
1999 OS supplies as parameters. The parameters are :
2001 =item minfo - A hash ref of module information, as returned by get_module_info
2003 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
2005 =item os-version - The Webmin OS version to use, such as 13.0
2007 =item api-only - If set to 1, considers a module supported if it provides an API to other modules on this OS, even if the majority of its functionality is not supported.
2010 sub check_os_support
2012 my $oss = $_[0]->{'os_support'};
2013 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
2014 # May provide usable API
2015 $oss .= " ".$_[0]->{'api_os_support'};
2017 if ($_[0]->{'nozone'} && &running_in_zone()) {
2018 # Not supported in a Solaris Zone
2021 if ($_[0]->{'novserver'} && &running_in_vserver()) {
2022 # Not supported in a Linux Vserver
2025 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
2026 # Not supported in an OpenVZ container
2029 return 1 if (!$oss || $oss eq '*');
2030 my $osver = $_[2] || $gconfig{'os_version'};
2031 my $ostype = $_[1] || $gconfig{'os_type'};
2034 my ($os, $ver, $codes);
2035 my ($neg) = ($oss =~ s/^!//); # starts with !
2036 $anyneg++ if ($neg);
2037 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2039 $os = $1; $ver = $2; $codes = $3; $oss = $4;
2041 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
2043 $os = $1; $ver = $2; $oss = $3;
2045 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2047 $os = $1; $codes = $2; $oss = $3;
2049 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
2051 $codes = $1; $oss = $2;
2053 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
2055 $os = $1; $oss = $2;
2058 next if ($os && !($os eq $ostype ||
2059 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
2060 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
2061 next if ($osver < $1 || $osver > $2);
2063 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
2064 next if ($osver < $1);
2066 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
2067 next if ($osver > $1);
2070 next if ($ver ne $osver);
2072 next if ($codes && !eval $codes);
2078 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2080 Downloads data from a HTTP url to a local file or string. The parameters are :
2082 =item host - The hostname part of the URL, such as www.google.com
2084 =item port - The HTTP port number, such as 80
2086 =item page - The filename part of the URL, like /index.html
2088 =item destfile - The local file to save the URL data to, like /tmp/index.html. This can also be a scalar reference, in which case the data will be appended to that scalar.
2090 =item error - If set to a scalar ref, the function will store any error message in this scalar and return 0 on failure, or 1 on success. If not set, it will simply call the error function if the download fails.
2092 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2094 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2096 =item user - If set, HTTP authentication is done with this username.
2098 =item pass - The HTTP password to use with the username above.
2100 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2102 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2104 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2106 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2111 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2112 $timeout, $osdn, $nocache, $headers) = @_;
2113 if ($gconfig{'debug_what_net'}) {
2114 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2115 ($user ? " user=$user pass=$pass" : "").
2116 (ref($dest) ? "" : " dest=$dest"));
2119 # Convert OSDN URL first
2120 my $prot = $ssl ? "https://" : "http://";
2121 my $portstr = $ssl && $port == 443 ||
2122 !$ssl && $port == 80 ? "" : ":$port";
2123 ($host, $port, $page, $ssl) = &parse_http_url(
2124 &convert_osdn_url($prot.$host.$portstr.$page));
2127 # Check if we already have cached the URL
2128 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2129 my $cfile = &check_in_http_cache($url);
2130 if ($cfile && !$nocache) {
2131 # Yes! Copy to dest file or variable
2132 &$cbfunc(6, $url) if ($cbfunc);
2134 &open_readfile(CACHEFILE, $cfile);
2136 $$dest = <CACHEFILE>;
2140 ©_source_dest($cfile, $dest);
2147 push(@headers, [ "Host", $host ]);
2148 push(@headers, [ "User-agent", "Webmin" ]);
2149 push(@headers, [ "Accept-language", "en" ]);
2151 my $auth = &encode_base64("$user:$pass");
2152 $auth =~ tr/\r\n//d;
2153 push(@headers, [ "Authorization", "Basic $auth" ]);
2155 foreach my $hname (keys %$headers) {
2156 push(@headers, [ $hname, $headers->{$hname} ]);
2159 # Actually download it
2160 $main::download_timed_out = undef;
2161 local $SIG{ALRM} = \&download_timeout;
2162 alarm($timeout || 60);
2163 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2165 $h = $main::download_timed_out if ($main::download_timed_out);
2167 if ($error) { $$error = $h; return; }
2168 else { &error($h); }
2170 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2171 $headers, $ssl, $nocache);
2172 if ((!$error || !$$error) && !$nocache) {
2173 &write_to_http_cache($url, $dest);
2177 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2179 Do a HTTP download, after the headers have been sent. For internal use only,
2180 typically called by http_download.
2183 sub complete_http_download
2185 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2191 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2192 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2194 if ($_[2]) { ${$_[2]} = $line; return; }
2195 else { &error("Download failed : $line"); }
2198 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2201 $line = &read_http_connection($_[0]);
2202 $line =~ tr/\r\n//d;
2203 $line =~ /^(\S+):\s+(.*)$/ || last;
2204 $header{lc($1)} = $2;
2205 push(@headers, [ lc($1), $2 ]);
2208 if ($main::download_timed_out) {
2209 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2210 else { &error($main::download_timed_out); }
2212 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2213 if ($rcode >= 300 && $rcode < 400) {
2214 # follow the redirect
2215 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2216 my ($host, $port, $page, $ssl);
2217 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2218 $ssl = $1 eq 'https' ? 1 : 0;
2223 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2224 $ssl = $1 eq 'https' ? 1 : 0;
2226 $port = $ssl ? 443 : 80;
2229 elsif ($header{'location'} =~ /^\// && $_[5]) {
2230 # Relative to same server
2234 $page = $header{'location'};
2236 elsif ($header{'location'}) {
2237 # Assume relative to same dir .. not handled
2238 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2239 else { &error("Invalid Location header $header{'location'}"); }
2242 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2243 else { &error("Missing Location header"); }
2246 ($page, $params) = split(/\?/, $page);
2248 $page .= "?".$params if (defined($params));
2249 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2250 undef, undef, undef, $_[4], $_[9], $_[7]);
2255 # Append to a variable
2256 while(defined($buf = &read_http_connection($_[0], 1024))) {
2258 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2264 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2265 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2266 else { &error("Failed to write to $_[1] : $!"); }
2268 binmode(PFILE); # For windows
2269 while(defined($buf = &read_http_connection($_[0], 1024))) {
2270 &print_tempfile(PFILE, $buf);
2271 $got += length($buf);
2272 &$cbfunc(3, $got) if ($cbfunc);
2274 &close_tempfile(PFILE);
2275 if ($header{'content-length'} &&
2276 $got != $header{'content-length'}) {
2277 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2278 else { &error("Download incomplete"); }
2281 &$cbfunc(4) if ($cbfunc);
2283 &close_http_connection($_[0]);
2287 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port], [no-cache])
2289 Download data from an FTP site to a local file. The parameters are :
2291 =item host - FTP server hostname
2293 =item file - File on the FTP server to download
2295 =item destfile - File on the Webmin system to download data to
2297 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2299 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2301 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2303 =item pass - Password for the username above.
2305 =item port - FTP server port number, which defaults to 21 if not set.
2307 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2312 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port, $nocache) = @_;
2314 if ($gconfig{'debug_what_net'}) {
2315 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2316 ($user ? " user=$user pass=$pass" : "").
2317 (ref($dest) ? "" : " dest=$dest"));
2321 if (&is_readonly_mode()) {
2322 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2324 else { &error("FTP connections not allowed in readonly mode"); }
2327 # Check if we already have cached the URL
2328 my $url = "ftp://".$host.$file;
2329 my $cfile = &check_in_http_cache($url);
2330 if ($cfile && !$nocache) {
2331 # Yes! Copy to dest file or variable
2332 &$cbfunc(6, $url) if ($cbfunc);
2334 &open_readfile(CACHEFILE, $cfile);
2336 $$dest = <CACHEFILE>;
2340 ©_source_dest($cfile, $dest);
2345 # Actually download it
2346 $main::download_timed_out = undef;
2347 local $SIG{ALRM} = \&download_timeout;
2350 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2351 # download through http-style proxy
2353 if (&open_socket($1, $2, "SOCK", \$error)) {
2355 if ($main::download_timed_out) {
2357 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2358 else { &error($main::download_timed_out); }
2360 my $esc = $_[1]; $esc =~ s/ /%20/g;
2361 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2362 my $portstr = $port == 21 ? "" : ":$port";
2363 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2364 print SOCK "User-agent: Webmin\r\n";
2365 if ($gconfig{'proxy_user'}) {
2366 my $auth = &encode_base64(
2367 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2368 $auth =~ tr/\r\n//d;
2369 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2372 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4],
2373 undef, undef, undef, undef, 0, $nocache);
2376 elsif (!$gconfig{'proxy_fallback'}) {
2378 if ($error) { $$error = $main::download_timed_out; return 0; }
2379 else { &error($main::download_timed_out); }
2384 # connect to host and login with real FTP protocol
2385 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2387 if ($main::download_timed_out) {
2388 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2389 else { &error($main::download_timed_out); }
2391 &ftp_command("", 2, $_[3]) || return 0;
2393 # Login as supplied user
2394 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2396 if (int($urv[1]/100) == 3) {
2397 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2401 # Login as anonymous
2402 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2404 if (int($urv[1]/100) == 3) {
2405 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2409 &$cbfunc(1, 0) if ($cbfunc);
2412 # get the file size and tell the callback
2413 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2414 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2415 defined($size) || return 0;
2417 &$cbfunc(2, int($size));
2421 my $pasv = &ftp_command("PASV", 2, $_[3]);
2422 defined($pasv) || return 0;
2423 $pasv =~ /\(([0-9,]+)\)/;
2424 @n = split(/,/ , $1);
2425 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2426 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2427 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2431 &open_tempfile(PFILE, ">$_[2]", 1);
2432 while(read(CON, $buf, 1024) > 0) {
2433 &print_tempfile(PFILE, $buf);
2434 $got += length($buf);
2435 &$cbfunc(3, $got) if ($cbfunc);
2437 &close_tempfile(PFILE);
2439 if ($got != $size) {
2440 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2441 else { &error("Download incomplete"); }
2443 &$cbfunc(4) if ($cbfunc);
2445 &ftp_command("", 2, $_[3]) || return 0;
2449 &ftp_command("QUIT", 2, $_[3]) || return 0;
2453 &write_to_http_cache($url, $dest);
2457 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2459 Upload data from a local file to an FTP site. The parameters are :
2461 =item host - FTP server hostname
2463 =item file - File on the FTP server to write to
2465 =item srcfile - File on the Webmin system to upload data from
2467 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2469 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2471 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2473 =item pass - Password for the username above.
2475 =item port - FTP server port number, which defaults to 21 if not set.
2482 if (&is_readonly_mode()) {
2483 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2485 else { &error("FTP connections not allowed in readonly mode"); }
2488 $main::download_timed_out = undef;
2489 local $SIG{ALRM} = \&download_timeout;
2492 # connect to host and login
2493 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2495 if ($main::download_timed_out) {
2496 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2497 else { &error($main::download_timed_out); }
2499 &ftp_command("", 2, $_[3]) || return 0;
2501 # Login as supplied user
2502 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2504 if (int($urv[1]/100) == 3) {
2505 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2509 # Login as anonymous
2510 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2512 if (int($urv[1]/100) == 3) {
2513 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2517 &$cbfunc(1, 0) if ($cbfunc);
2519 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2521 # get the file size and tell the callback
2522 my @st = stat($_[2]);
2524 &$cbfunc(2, $st[7]);
2528 my $pasv = &ftp_command("PASV", 2, $_[3]);
2529 defined($pasv) || return 0;
2530 $pasv =~ /\(([0-9,]+)\)/;
2531 @n = split(/,/ , $1);
2532 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2533 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2538 while(read(PFILE, $buf, 1024) > 0) {
2540 $got += length($buf);
2541 &$cbfunc(3, $got) if ($cbfunc);
2545 if ($got != $st[7]) {
2546 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2547 else { &error("Upload incomplete"); }
2549 &$cbfunc(4) if ($cbfunc);
2552 &ftp_command("", 2, $_[3]) || return 0;
2553 &ftp_command("QUIT", 2, $_[3]) || return 0;
2559 =head2 no_proxy(host)
2561 Checks if some host is on the no proxy list. For internal use by the
2562 http_download and ftp_download functions.
2567 my $ip = &to_ipaddress($_[0]);
2568 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2569 return 1 if ($_[0] =~ /\Q$n\E/ ||
2575 =head2 open_socket(host, port, handle, [&error])
2577 Open a TCP connection to some host and port, using a file handle. The
2580 =item host - Hostname or IP address to connect to.
2582 =item port - TCP port number.
2584 =item handle - A file handle name to use for the connection.
2586 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2591 my ($host, $port, $fh, $err) = @_;
2592 $fh = &callers_package($fh);
2594 if ($gconfig{'debug_what_net'}) {
2595 &webmin_debug_log('TCP', "host=$host port=$port");
2598 # Lookup IP address for the host. Try v4 first, and failing that v6
2600 my $proto = getprotobyname("tcp");
2601 if ($ip = &to_ipaddress($host)) {
2602 # Create IPv4 socket and connection
2603 if (!socket($fh, PF_INET(), SOCK_STREAM, $proto)) {
2604 my $msg = "Failed to create socket : $!";
2605 if ($err) { $$err = $msg; return 0; }
2606 else { &error($msg); }
2608 my $addr = inet_aton($ip);
2609 if ($gconfig{'bind_proxy'}) {
2610 # BIND to outgoing IP
2611 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2612 my $msg = "Failed to bind to source address : $!";
2613 if ($err) { $$err = $msg; return 0; }
2614 else { &error($msg); }
2617 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2618 my $msg = "Failed to connect to $host:$port : $!";
2619 if ($err) { $$err = $msg; return 0; }
2620 else { &error($msg); }
2623 elsif ($ip = &to_ip6address($host)) {
2624 # Create IPv6 socket and connection
2625 if (!&supports_ipv6()) {
2626 $msg = "IPv6 connections are not supported";
2627 if ($err) { $$err = $msg; return 0; }
2628 else { &error($msg); }
2630 if (!socket($fh, Socket6::PF_INET6(), SOCK_STREAM, $proto)) {
2631 my $msg = "Failed to create IPv6 socket : $!";
2632 if ($err) { $$err = $msg; return 0; }
2633 else { &error($msg); }
2635 my $addr = inet_pton(Socket6::AF_INET6(), $ip);
2636 if (!connect($fh, pack_sockaddr_in6($port, $addr))) {
2637 my $msg = "Failed to IPv6 connect to $host:$port : $!";
2638 if ($err) { $$err = $msg; return 0; }
2639 else { &error($msg); }
2644 my $msg = "Failed to lookup IP address for $host";
2645 if ($err) { $$err = $msg; return 0; }
2646 else { &error($msg); }
2650 my $old = select($fh);
2656 =head2 download_timeout
2658 Called when a download times out. For internal use only.
2661 sub download_timeout
2663 $main::download_timed_out = "Download timed out";
2666 =head2 ftp_command(command, expected, [&error], [filehandle])
2668 Send an FTP command, and die if the reply is not what was expected. Mainly
2669 for internal use by the ftp_download and ftp_upload functions.
2674 my ($cmd, $expect, $err, $fh) = @_;
2676 $fh = &callers_package($fh);
2679 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2681 print $fh "$cmd\r\n";
2684 if (!($line = <$fh>)) {
2686 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2687 else { &error("Failed to read reply to $what"); }
2689 $line =~ /^(...)(.)(.*)$/;
2692 foreach my $c (@$expect) {
2693 $found++ if (int($1/100) == $c);
2697 $found++ if (int($1/100) == $_[1]);
2701 if ($err) { $$err = "$what failed : $3"; return undef; }
2702 else { &error("$what failed : $3"); }
2707 # Need to skip extra stuff..
2709 if (!($line = <$fh>)) {
2711 if ($$err) { $$err = "Failed to read reply to $what";
2713 else { &error("Failed to read reply to $what"); }
2715 $line =~ /^(....)(.*)$/; $reply .= $2;
2716 if ($1 eq "$rcode ") { last; }
2720 return wantarray ? ($reply, $rcode) : $reply;
2723 =head2 to_ipaddress(hostname)
2725 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2726 it cannot be resolved.
2731 if (&check_ipaddress($_[0])) {
2732 return $_[0]; # Already in v4 format
2734 elsif (&check_ip6address($_[0])) {
2735 return undef; # A v6 address cannot be converted to v4
2738 my $hn = gethostbyname($_[0]);
2739 return undef if (!$hn);
2740 local @ip = unpack("CCCC", $hn);
2741 return join("." , @ip);
2745 =head2 to_ip6address(hostname)
2747 Converts a hostname to IPv6 address, or returns undef if it cannot be resolved.
2752 if (&check_ip6address($_[0])) {
2753 return $_[0]; # Already in v6 format
2755 elsif (&check_ipaddress($_[0])) {
2756 return undef; # A v4 address cannot be v6
2758 elsif (!&supports_ipv6()) {
2759 return undef; # Cannot lookup
2762 # Perform IPv6 DNS lookup
2764 (undef, undef, undef, $inaddr) =
2765 getaddrinfo($_[0], undef, Socket6::AF_INET6(), SOCK_STREAM);
2766 return undef if (!$inaddr);
2768 (undef, $addr) = unpack_sockaddr_in6($inaddr);
2769 return inet_ntop(Socket6::AF_INET6(), $addr);
2773 =head2 to_hostname(ipv4|ipv6-address)
2775 Reverse-resolves an IPv4 or 6 address to a hostname
2781 if (&check_ip6address($addr) && &supports_ipv6()) {
2782 return gethostbyaddr(inet_pton(Socket6::AF_INET6(), $addr),
2783 Socket6::AF_INET6());
2786 return gethostbyaddr(inet_aton($addr), AF_INET);
2790 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2792 Renders a 4-column table of icons. The useful parameters are :
2794 =item links - An array ref of link destination URLs for the icons.
2796 =item titles - An array ref of titles to appear under the icons.
2798 =item icons - An array ref of URLs for icon images.
2800 =item columns - Number of columns to layout the icons with. Defaults to 4.
2805 &load_theme_library();
2806 if (defined(&theme_icons_table)) {
2807 &theme_icons_table(@_);
2811 my $cols = $_[3] ? $_[3] : 4;
2812 my $per = int(100.0 / $cols);
2813 print "<table class='icons_table' width=100% cellpadding=5>\n";
2814 for(my $i=0; $i<@{$_[0]}; $i++) {
2815 if ($i%$cols == 0) { print "<tr>\n"; }
2816 print "<td width=$per% align=center valign=top>\n";
2817 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2818 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2819 $_[7]->[$i], $_[8]->[$i]);
2821 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2823 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2824 print "</tr>\n" if ($need_tr);
2828 =head2 replace_file_line(file, line, [newline]*)
2830 Replaces one line in some file with 0 or more new lines. The parameters are :
2832 =item file - Full path to some file, like /etc/hosts.
2834 =item line - Line number to replace, starting from 0.
2836 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2839 sub replace_file_line
2842 my $realfile = &translate_filename($_[0]);
2843 open(FILE, $realfile);
2846 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2847 else { splice(@lines, $_[1], 1); }
2848 &open_tempfile(FILE, ">$realfile");
2849 &print_tempfile(FILE, @lines);
2850 &close_tempfile(FILE);
2853 =head2 read_file_lines(file, [readonly])
2855 Returns a reference to an array containing the lines from some file. This
2856 array can be modified, and will be written out when flush_file_lines()
2857 is called. The parameters are :
2859 =item file - Full path to the file to read.
2861 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2865 $lref = read_file_lines("/etc/hosts");
2866 push(@$lref, "127.0.0.1 localhost");
2867 flush_file_lines("/etc/hosts");
2873 my ($package, $filename, $line) = caller;
2874 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2876 my $realfile = &translate_filename($_[0]);
2877 if (!$main::file_cache{$realfile}) {
2880 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2881 open(READFILE, $realfile);
2884 $eol = /\r\n$/ ? "\r\n" : "\n";
2890 $main::file_cache{$realfile} = \@lines;
2891 $main::file_cache_noflush{$realfile} = $_[1];
2892 $main::file_cache_eol{$realfile} = $eol || "\n";
2895 # Make read-write if currently readonly
2897 $main::file_cache_noflush{$realfile} = 0;
2900 return $main::file_cache{$realfile};
2903 =head2 flush_file_lines([file], [eol])
2905 Write out to a file previously read by read_file_lines to disk (except
2906 for those marked readonly). The parameters are :
2908 =item file - The file to flush out.
2910 =item eof - End-of-line character for each line. Defaults to \n.
2913 sub flush_file_lines
2917 local $trans = &translate_filename($_[0]);
2918 $main::file_cache{$trans} ||
2919 &error("flush_file_lines called on non-loaded file $trans");
2920 push(@files, $trans);
2923 @files = ( keys %main::file_cache );
2925 foreach my $f (@files) {
2926 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2927 if (!$main::file_cache_noflush{$f}) {
2928 no warnings; # XXX Bareword file handles should go away
2929 &open_tempfile(FLUSHFILE, ">$f");
2930 foreach my $line (@{$main::file_cache{$f}}) {
2931 (print FLUSHFILE $line,$eol) ||
2932 &error(&text("efilewrite", $f, $!));
2934 &close_tempfile(FLUSHFILE);
2936 delete($main::file_cache{$f});
2937 delete($main::file_cache_noflush{$f});
2941 =head2 unflush_file_lines(file)
2943 Clear the internal cache of some given file, previously read by read_file_lines.
2946 sub unflush_file_lines
2948 my $realfile = &translate_filename($_[0]);
2949 delete($main::file_cache{$realfile});
2950 delete($main::file_cache_noflush{$realfile});
2953 =head2 unix_user_input(fieldname, user, [form])
2955 Returns HTML for an input to select a Unix user. By default this is a text
2956 box with a user popup button next to it.
2961 if (defined(&theme_unix_user_input)) {
2962 return &theme_unix_user_input(@_);
2964 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2965 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2968 =head2 unix_group_input(fieldname, user, [form])
2970 Returns HTML for an input to select a Unix group. By default this is a text
2971 box with a group popup button next to it.
2974 sub unix_group_input
2976 if (defined(&theme_unix_group_input)) {
2977 return &theme_unix_group_input(@_);
2979 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2980 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2983 =head2 hlink(text, page, [module], [width], [height])
2985 Returns HTML for a link that when clicked on pops up a window for a Webmin
2986 help page. The parameters are :
2988 =item text - Text for the link.
2990 =item page - Help page code, such as 'intro'.
2992 =item module - Module the help page is in. Defaults to the current module.
2994 =item width - Width of the help popup window. Defaults to 600 pixels.
2996 =item height - Height of the help popup window. Defaults to 400 pixels.
2998 The actual help pages are in each module's help sub-directory, in files with
3004 if (defined(&theme_hlink)) {
3005 return &theme_hlink(@_);
3007 my $mod = $_[2] ? $_[2] : &get_module_name();
3008 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
3009 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
3010 return "<a onClick='window.open(\"$gconfig{'webprefix'}/help.cgi/$mod/$_[1]\", \"help\", \"toolbar=no,menubar=no,scrollbars=yes,width=$width,height=$height,resizable=yes\"); return false' href=\"$gconfig{'webprefix'}/help.cgi/$mod/$_[1]\">$_[0]</a>";
3013 =head2 user_chooser_button(field, multiple, [form])
3015 Returns HTML for a javascript button for choosing a Unix user or users.
3016 The parameters are :
3018 =item field - Name of the HTML field to place the username into.
3020 =item multiple - Set to 1 if multiple users can be selected.
3022 =item form - Index of the form on the page.
3025 sub user_chooser_button
3027 return undef if (!&supports_users());
3028 return &theme_user_chooser_button(@_)
3029 if (defined(&theme_user_chooser_button));
3030 my $form = defined($_[2]) ? $_[2] : 0;
3031 my $w = $_[1] ? 500 : 300;
3033 if ($_[1] && $gconfig{'db_sizeusers'}) {
3034 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3036 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3037 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3039 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/user_chooser.cgi?multi=$_[1]&user=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
3042 =head2 group_chooser_button(field, multiple, [form])
3044 Returns HTML for a javascript button for choosing a Unix group or groups
3045 The parameters are :
3047 =item field - Name of the HTML field to place the group name into.
3049 =item multiple - Set to 1 if multiple groups can be selected.
3051 =item form - Index of the form on the page.
3054 sub group_chooser_button
3056 return undef if (!&supports_users());
3057 return &theme_group_chooser_button(@_)
3058 if (defined(&theme_group_chooser_button));
3059 my $form = defined($_[2]) ? $_[2] : 0;
3060 my $w = $_[1] ? 500 : 300;
3062 if ($_[1] && $gconfig{'db_sizeusers'}) {
3063 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3065 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3066 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3068 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/group_chooser.cgi?multi=$_[1]&group=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
3071 =head2 foreign_check(module, [api-only])
3073 Checks if some other module exists and is supported on this OS. The parameters
3076 =item module - Name of the module to check.
3078 =item api-only - Set to 1 if you just want to check if the module provides an API that others can call, instead of the full web UI.
3083 my ($mod, $api) = @_;
3085 my $mdir = &module_root_directory($mod);
3086 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
3087 return &check_os_support(\%minfo, undef, undef, $api);
3090 =head2 foreign_exists(module)
3092 Checks if some other module exists. The module parameter is the short module
3098 my $mdir = &module_root_directory($_[0]);
3099 return -r "$mdir/module.info";
3102 =head2 foreign_available(module)
3104 Returns 1 if some module is installed, and acessible to the current user. The
3105 module parameter is the module directory name.
3108 sub foreign_available
3110 return 0 if (!&foreign_check($_[0]) &&
3111 !$gconfig{'available_even_if_no_support'});
3112 my %foreign_module_info = &get_module_info($_[0]);
3114 # Check list of allowed modules
3116 &read_acl(\%acl, undef, [ $base_remote_user ]);
3117 return 0 if (!$acl{$base_remote_user,$_[0]} &&
3118 !$acl{$base_remote_user,'*'});
3120 # Check for usermod restrictions
3121 my @usermods = &list_usermods();
3122 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
3124 if (&get_product_name() eq "webmin") {
3125 # Check if the user has any RBAC privileges in this module
3126 if (&supports_rbac($_[0]) &&
3127 &use_rbac_module_acl(undef, $_[0])) {
3128 # RBAC is enabled for this user and module - check if he
3130 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
3131 return 0 if (!$rbacs);
3133 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
3134 # If denying access to modules not specifically allowed by
3135 # RBAC, then prevent access
3140 # Check readonly support
3141 if (&is_readonly_mode()) {
3142 return 0 if (!$foreign_module_info{'readonly'});
3145 # Check if theme vetos
3146 if (defined(&theme_foreign_available)) {
3147 return 0 if (!&theme_foreign_available($_[0]));
3150 # Check if licence module vetos
3151 if ($main::licence_module) {
3152 return 0 if (!&foreign_call($main::licence_module,
3153 "check_module_licence", $_[0]));
3159 =head2 foreign_require(module, [file], [package])
3161 Brings in functions from another module, and places them in the Perl namespace
3162 with the same name as the module. The parameters are :
3164 =item module - The source module's directory name, like sendmail.
3166 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
3168 =item package - Perl package to place the module's functions and global variables in.
3170 If the original module name contains dashes, they will be replaced with _ in
3176 my ($mod, $file, $pkg) = @_;
3177 $pkg ||= $mod || "global";
3178 $pkg =~ s/[^A-Za-z0-9]/_/g;
3181 push(@files, $file);
3185 my %minfo = &get_module_info($mod);
3186 if ($minfo{'library'}) {
3187 @files = split(/\s+/, $minfo{'library'});
3190 @files = ( $mod."-lib.pl" );
3193 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3194 return 1 if (!@files);
3195 foreach my $f (@files) {
3196 $main::done_foreign_require{$pkg,$f}++;
3199 my $mdir = &module_root_directory($mod);
3200 @INC = &unique($mdir, @INC);
3201 -d $mdir || &error("Module $mod does not exist");
3202 if (!&get_module_name() && $mod) {
3205 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3206 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3207 my $code = "package $pkg; ".
3208 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3209 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3210 foreach my $f (@files) {
3211 $code .= "do '$mdir/$f' || die \$@; ";
3214 if (defined($old_fmn)) {
3215 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3218 delete($ENV{'FOREIGN_MODULE_NAME'});
3220 if (defined($old_frd)) {
3221 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3224 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3227 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3231 =head2 foreign_call(module, function, [arg]*)
3233 Call a function in another module. The module parameter is the target module
3234 directory name, function is the perl sub to call, and the remaining parameters
3235 are the arguments. However, unless you need to call a function whose name
3236 is dynamic, it is better to use Perl's cross-module function call syntax
3237 like module::function(args).
3242 my $pkg = $_[0] || "global";
3243 $pkg =~ s/[^A-Za-z0-9]/_/g;
3244 my @args = @_[2 .. @_-1];
3245 $main::foreign_args = \@args;
3246 my @rv = eval <<EOF;
3248 &$_[1](\@{\$main::foreign_args});
3250 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3251 return wantarray ? @rv : $rv[0];
3254 =head2 foreign_config(module, [user-config])
3256 Get the configuration from another module, and return it as a hash. If the
3257 user-config parameter is set to 1, returns the Usermin user-level preferences
3258 for the current user instead.
3263 my ($mod, $uc) = @_;
3266 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3267 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3268 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3271 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3276 =head2 foreign_installed(module, mode)
3278 Checks if the server for some module is installed, and possibly also checks
3279 if the module has been configured by Webmin.
3280 For mode 1, returns 2 if the server is installed and configured for use by
3281 Webmin, 1 if installed but not configured, or 0 otherwise.
3282 For mode 0, returns 1 if installed, 0 if not.
3283 If the module does not provide an install_check.pl script, assumes that
3284 the server is installed.
3287 sub foreign_installed
3289 my ($mod, $configured) = @_;
3290 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3292 return $main::foreign_installed_cache{$mod,$configured};
3296 if (!&foreign_check($mod)) {
3301 my $mdir = &module_root_directory($mod);
3302 if (!-r "$mdir/install_check.pl") {
3303 # Not known, assume OK
3304 $rv = $configured ? 2 : 1;
3307 # Call function to check
3308 &foreign_require($mod, "install_check.pl");
3309 $rv = &foreign_call($mod, "is_installed", $configured);
3312 $main::foreign_installed_cache{$mod,$configured} = $rv;
3317 =head2 foreign_defined(module, function)
3319 Returns 1 if some function is defined in another module. In general, it is
3320 simpler to use the syntax &defined(module::function) instead.
3326 $pkg =~ s/[^A-Za-z0-9]/_/g;
3327 my $func = "${pkg}::$_[1]";
3328 return defined(&$func);
3331 =head2 get_system_hostname([short], [skip-file])
3333 Returns the hostname of this system. If the short parameter is set to 1,
3334 then the domain name is not prepended - otherwise, Webmin will attempt to get
3335 the fully qualified hostname, like foo.example.com.
3338 sub get_system_hostname
3341 my $skipfile = $_[1];
3342 if (!$main::get_system_hostname[$m]) {
3343 if ($gconfig{'os_type'} ne 'windows') {
3344 # Try some common Linux hostname files first
3347 # Never get from file
3349 elsif ($gconfig{'os_type'} eq 'redhat-linux') {
3351 &read_env_file("/etc/sysconfig/network", \%nc);
3352 if ($nc{'HOSTNAME'}) {
3353 $fromfile = $nc{'HOSTNAME'};
3356 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3357 my $hn = &read_file_contents("/etc/hostname");
3363 elsif ($gconfig{'os_type'} eq 'open-linux') {
3364 my $hn = &read_file_contents("/etc/HOSTNAME");
3370 elsif ($gconfig{'os_type'} eq 'solaris') {
3371 my $hn = &read_file_contents("/etc/nodename");
3378 # If we found a hostname in a file, use it
3379 if ($fromfile && ($m || $fromfile =~ /\./)) {
3381 $fromfile =~ s/\..*$//;
3383 $main::get_system_hostname[$m] = $fromfile;
3387 # Can use hostname command on Unix
3388 &execute_command("hostname", undef,
3389 \$main::get_system_hostname[$m], undef, 0, 1);
3390 chop($main::get_system_hostname[$m]);
3392 eval "use Sys::Hostname";
3394 $main::get_system_hostname[$m] = eval "hostname()";
3396 if ($@ || !$main::get_system_hostname[$m]) {
3397 $main::get_system_hostname[$m] = "UNKNOWN";
3400 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3401 $gconfig{'os_type'} =~ /linux$/ &&
3402 !$gconfig{'no_hostname_f'} && !$_[0]) {
3403 # Try with -f flag to get fully qualified name
3405 my $ex = &execute_command("hostname -f", undef, \$flag,
3408 if ($ex || $flag eq "") {
3409 # -f not supported! We have probably set the
3410 # hostname to just '-f'. Fix the problem
3413 &execute_command("hostname ".
3414 quotemeta($main::get_system_hostname[$m]),
3415 undef, undef, undef, 0, 1);
3419 $main::get_system_hostname[$m] = $flag;
3424 # On Windows, try computername environment variable
3425 return $ENV{'computername'} if ($ENV{'computername'});
3426 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3428 # Fall back to net name command
3429 my $out = `net name 2>&1`;
3430 if ($out =~ /\-+\r?\n(\S+)/) {
3431 $main::get_system_hostname[$m] = $1;
3434 $main::get_system_hostname[$m] = "windows";
3438 return $main::get_system_hostname[$m];
3441 =head2 get_webmin_version
3443 Returns the version of Webmin currently being run, such as 1.450.
3446 sub get_webmin_version
3448 if (!$get_webmin_version) {
3449 open(VERSION, "$root_directory/version") || return 0;
3450 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3453 return $get_webmin_version;
3456 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3458 Returns a hash containing access control options for the given user and module.
3459 By default the current username and module name are used. If the no-rbac flag
3460 is given, the permissions will not be updated based on the user's RBAC role
3461 (as seen on Solaris). If the no-default flag is given, default permissions for
3462 the module will not be included.
3467 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3468 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3469 my $mdir = &module_root_directory($m);
3472 # Read default ACL first, to be overridden by per-user settings
3473 &read_file_cached("$mdir/defaultacl", \%rv);
3475 # If this isn't a master admin user, apply the negative permissions
3476 # so that he doesn't un-expectedly gain access to new features
3478 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3479 if ($gaccess{'negative'}) {
3480 &read_file_cached("$mdir/negativeacl", \%rv);
3484 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3485 # RBAC overrides exist for this user in this module
3486 my $rbac = &get_rbac_module_acl(
3487 defined($_[0]) ? $_[0] : $remote_user, $m);
3488 foreach my $r (keys %$rbac) {
3489 $rv{$r} = $rbac->{$r};
3492 elsif ($gconfig{"risk_$u"} && $m) {
3493 # ACL is defined by user's risk level
3494 my $rf = $gconfig{"risk_$u"}.'.risk';
3495 &read_file_cached("$mdir/$rf", \%rv);
3497 my $sf = $gconfig{"skill_$u"}.'.skill';
3498 &read_file_cached("$mdir/$sf", \%rv);
3501 # Use normal Webmin ACL, if a user is set
3502 my $userdb = &get_userdb_string();
3504 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3505 # Look for this user in the user/group DB, if one is defined
3506 # and if the user might be in the DB
3507 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3508 ref($dbh) || &error(&text('euserdbacl', $dbh));
3509 if ($proto eq "mysql" || $proto eq "postgresql") {
3510 # Find the user in the SQL DB
3511 my $cmd = $dbh->prepare(
3512 "select id from webmin_user where name = ?");
3513 $cmd && $cmd->execute($u) ||
3514 &error(&text('euserdbacl', $dbh->errstr));
3515 my ($id) = $cmd->fetchrow();
3516 $foundindb = 1 if (defined($id));
3519 # Fetch ACLs with SQL
3521 my $cmd = $dbh->prepare(
3522 "select attr,value from webmin_user_acl ".
3523 "where id = ? and module = ?");
3524 $cmd && $cmd->execute($id, $m) ||
3525 &error(&text('euserdbacl', $dbh->errstr));
3526 while(my ($a, $v) = $cmd->fetchrow()) {
3532 elsif ($proto eq "ldap") {
3534 my $rv = $dbh->search(
3536 filter => '(&(cn='.$u.')(objectClass='.
3537 $args->{'userclass'}.'))',
3539 if (!$rv || $rv->code) {
3540 &error(&text('euserdbacl',
3541 $rv ? $rv->error : "Unknown error"));
3543 my ($user) = $rv->all_entries;
3545 # Find ACL sub-object for the module
3546 my $ldapm = $m || "global";
3548 my $rv = $dbh->search(
3549 base => $user->dn(),
3550 filter => '(cn='.$ldapm.')',
3552 if (!$rv || $rv->code) {
3553 &error(&text('euserdbacl',
3554 $rv ? $rv->error : "Unknown error"));
3556 my ($acl) = $rv->all_entries;
3558 foreach my $av ($acl->get_value(
3559 'webminAclEntry')) {
3560 my ($a, $v) = split(/=/, $av,2);
3566 &disconnect_userdb($userdb, $dbh);
3570 # Read from local files
3571 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3572 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3574 "$config_directory/$m/$remote_user.acl",\%rv);
3578 if ($tconfig{'preload_functions'}) {
3579 &load_theme_library();
3581 if (defined(&theme_get_module_acl)) {
3582 %rv = &theme_get_module_acl($u, $m, \%rv);
3587 =head2 get_group_module_acl(group, [module], [no-default])
3589 Returns the ACL for a Webmin group, in an optional module (which defaults to
3590 the current module).
3593 sub get_group_module_acl
3596 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3597 my $mdir = &module_root_directory($m);
3600 &read_file_cached("$mdir/defaultacl", \%rv);
3603 my $userdb = &get_userdb_string();
3606 # Look for this group in the user/group DB
3607 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3608 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3609 if ($proto eq "mysql" || $proto eq "postgresql") {
3610 # Find the group in the SQL DB
3611 my $cmd = $dbh->prepare(
3612 "select id from webmin_group where name = ?");
3613 $cmd && $cmd->execute($g) ||
3614 &error(&text('egroupdbacl', $dbh->errstr));
3615 my ($id) = $cmd->fetchrow();
3616 $foundindb = 1 if (defined($id));
3619 # Fetch ACLs with SQL
3621 my $cmd = $dbh->prepare(
3622 "select attr,value from webmin_group_acl ".
3623 "where id = ? and module = ?");
3624 $cmd && $cmd->execute($id, $m) ||
3625 &error(&text('egroupdbacl', $dbh->errstr));
3626 while(my ($a, $v) = $cmd->fetchrow()) {
3632 elsif ($proto eq "ldap") {
3633 # Find group in LDAP
3634 my $rv = $dbh->search(
3636 filter => '(&(cn='.$g.')(objectClass='.
3637 $args->{'groupclass'}.'))',
3639 if (!$rv || $rv->code) {
3640 &error(&text('egroupdbacl',
3641 $rv ? $rv->error : "Unknown error"));
3643 my ($group) = $rv->all_entries;
3645 # Find ACL sub-object for the module
3646 my $ldapm = $m || "global";
3648 my $rv = $dbh->search(
3649 base => $group->dn(),
3650 filter => '(cn='.$ldapm.')',
3652 if (!$rv || $rv->code) {
3653 &error(&text('egroupdbacl',
3654 $rv ? $rv->error : "Unknown error"));
3656 my ($acl) = $rv->all_entries;
3658 foreach my $av ($acl->get_value(
3659 'webminAclEntry')) {
3660 my ($a, $v) = split(/=/, $av, 2);
3666 &disconnect_userdb($userdb, $dbh);
3669 # Read from local files
3670 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3672 if (defined(&theme_get_module_acl)) {
3673 %rv = &theme_get_module_acl($g, $m, \%rv);
3678 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3680 Updates the acl hash for some user and module. The parameters are :
3682 =item acl - Hash reference for the new access control options, or undef to clear
3684 =item user - User to update, defaulting to the current user.
3686 =item module - Module to update, defaulting to the caller.
3688 =item never-update-group - Never update the user's group's ACL
3693 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3694 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3695 if (!$_[3] && &foreign_check("acl")) {
3696 # Check if this user is a member of a group, and if he gets the
3697 # module from a group. If so, update its ACL as well
3698 &foreign_require("acl", "acl-lib.pl");
3700 foreach my $g (&acl::list_groups()) {
3701 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3702 &indexof($m, @{$g->{'modules'}}) >= 0) {
3708 &save_group_module_acl($_[0], $group->{'name'}, $m);
3712 my $userdb = &get_userdb_string();
3714 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3715 # Look for this user in the user/group DB
3716 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3717 ref($dbh) || &error(&text('euserdbacl', $dbh));
3718 if ($proto eq "mysql" || $proto eq "postgresql") {
3719 # Find the user in the SQL DB
3720 my $cmd = $dbh->prepare(
3721 "select id from webmin_user where name = ?");
3722 $cmd && $cmd->execute($u) ||
3723 &error(&text('euserdbacl2', $dbh->errstr));
3724 my ($id) = $cmd->fetchrow();
3725 $foundindb = 1 if (defined($id));
3728 # Replace ACLs for user
3730 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3731 "where id = ? and module = ?");
3732 $cmd && $cmd->execute($id, $m) ||
3733 &error(&text('euserdbacl', $dbh->errstr));
3736 my $cmd = $dbh->prepare(
3737 "insert into webmin_user_acl ".
3738 "(id,module,attr,value) values (?,?,?,?)");
3739 $cmd || &error(&text('euserdbacl2',
3741 foreach my $a (keys %{$_[0]}) {
3742 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3743 &error(&text('euserdbacl2',
3750 elsif ($proto eq "ldap") {
3751 # Find the user in LDAP
3752 my $rv = $dbh->search(
3754 filter => '(&(cn='.$u.')(objectClass='.
3755 $args->{'userclass'}.'))',
3757 if (!$rv || $rv->code) {
3758 &error(&text('euserdbacl',
3759 $rv ? $rv->error : "Unknown error"));
3761 my ($user) = $rv->all_entries;
3764 # Find the ACL sub-object for the module
3766 my $ldapm = $m || "global";
3767 my $rv = $dbh->search(
3768 base => $user->dn(),
3769 filter => '(cn='.$ldapm.')',
3771 if (!$rv || $rv->code) {
3772 &error(&text('euserdbacl',
3773 $rv ? $rv->error : "Unknown error"));
3775 my ($acl) = $rv->all_entries;
3778 foreach my $a (keys %{$_[0]}) {
3779 push(@al, $a."=".$_[0]->{$a});
3783 $rv = $dbh->modify($acl->dn(),
3784 replace => { "webminAclEntry", \@al });
3788 my @attrs = ( "cn", $ldapm,
3789 "objectClass", "webminAcl",
3790 "webminAclEntry", \@al );
3791 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3794 if (!$rv || $rv->code) {
3795 &error(&text('euserdbacl2',
3796 $rv ? $rv->error : "Unknown error"));
3800 &disconnect_userdb($userdb, $dbh);
3804 # Save ACL to local file
3805 if (!-d "$config_directory/$m") {
3806 mkdir("$config_directory/$m", 0755);
3809 &write_file("$config_directory/$m/$u.acl", $_[0]);
3812 &unlink_file("$config_directory/$m/$u.acl");
3817 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3819 Updates the acl hash for some group and module. The parameters are :
3821 =item acl - Hash reference for the new access control options.
3823 =item group - Group name to update.
3825 =item module - Module to update, defaulting to the caller.
3827 =item never-update-group - Never update the parent group's ACL
3830 sub save_group_module_acl
3833 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3834 if (!$_[3] && &foreign_check("acl")) {
3835 # Check if this group is a member of a group, and if it gets the
3836 # module from a group. If so, update the parent ACL as well
3837 &foreign_require("acl", "acl-lib.pl");
3839 foreach my $pg (&acl::list_groups()) {
3840 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3841 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3847 &save_group_module_acl($_[0], $group->{'name'}, $m);
3851 my $userdb = &get_userdb_string();
3854 # Look for this group in the user/group DB
3855 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3856 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3857 if ($proto eq "mysql" || $proto eq "postgresql") {
3858 # Find the group in the SQL DB
3859 my $cmd = $dbh->prepare(
3860 "select id from webmin_group where name = ?");
3861 $cmd && $cmd->execute($g) ||
3862 &error(&text('egroupdbacl2', $dbh->errstr));
3863 my ($id) = $cmd->fetchrow();
3864 $foundindb = 1 if (defined($id));
3867 # Replace ACLs for group
3869 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3870 "where id = ? and module = ?");
3871 $cmd && $cmd->execute($id, $m) ||
3872 &error(&text('egroupdbacl', $dbh->errstr));
3875 my $cmd = $dbh->prepare(
3876 "insert into webmin_group_acl ".
3877 "(id,module,attr,value) values (?,?,?,?)");
3878 $cmd || &error(&text('egroupdbacl2',
3880 foreach my $a (keys %{$_[0]}) {
3881 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3882 &error(&text('egroupdbacl2',
3889 elsif ($proto eq "ldap") {
3890 # Find the group in LDAP
3891 my $rv = $dbh->search(
3893 filter => '(&(cn='.$g.')(objectClass='.
3894 $args->{'groupclass'}.'))',
3896 if (!$rv || $rv->code) {
3897 &error(&text('egroupdbacl',
3898 $rv ? $rv->error : "Unknown error"));
3900 my ($group) = $rv->all_entries;
3902 my $ldapm = $m || "global";
3904 # Find the ACL sub-object for the module
3906 my $rv = $dbh->search(
3907 base => $group->dn(),
3908 filter => '(cn='.$ldapm.')',
3910 if (!$rv || $rv->code) {
3911 &error(&text('egroupdbacl',
3912 $rv ? $rv->error : "Unknown error"));
3914 my ($acl) = $rv->all_entries;
3917 foreach my $a (keys %{$_[0]}) {
3918 push(@al, $a."=".$_[0]->{$a});
3922 $rv = $dbh->modify($acl->dn(),
3923 replace => { "webminAclEntry", \@al });
3927 my @attrs = ( "cn", $ldapm,
3928 "objectClass", "webminAcl",
3929 "webminAclEntry", \@al );
3930 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
3933 if (!$rv || $rv->code) {
3934 &error(&text('egroupdbacl2',
3935 $rv ? $rv->error : "Unknown error"));
3939 &disconnect_userdb($userdb, $dbh);
3943 # Save ACL to local file
3944 if (!-d "$config_directory/$m") {
3945 mkdir("$config_directory/$m", 0755);
3948 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3951 &unlink_file("$config_directory/$m/$g.gacl");
3958 This function must be called by all Webmin CGI scripts, either directly or
3959 indirectly via a per-module lib.pl file. It performs a number of initialization
3960 and housekeeping tasks, such as working out the module name, checking that the
3961 current user has access to the module, and populating global variables. Some
3962 of the variables set include :
3964 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3966 =item $var_directory - Base logs directory, typically /var/webmin
3968 =item %config - Per-module configuration.
3970 =item %gconfig - Global configuration.
3972 =item $scriptname - Base name of the current perl script.
3974 =item $module_name - The name of the current module.
3976 =item $module_config_directory - The config directory for this module.
3978 =item $module_config_file - The config file for this module.
3980 =item $module_root_directory - This module's code directory.
3982 =item $webmin_logfile - The detailed logfile for webmin.
3984 =item $remote_user - The actual username used to login to webmin.
3986 =item $base_remote_user - The username whose permissions are in effect.
3988 =item $current_theme - The theme currently in use.
3990 =item $root_directory - The first root directory of this webmin install.
3992 =item @root_directories - All root directories for this webmin install.
3997 # Record first process ID that called this, so we know when it exited to clean
3999 $main::initial_process_id ||= $$;
4001 # Configuration and spool directories
4002 if (!defined($ENV{'WEBMIN_CONFIG'})) {
4003 die "WEBMIN_CONFIG not set";
4005 $config_directory = $ENV{'WEBMIN_CONFIG'};
4006 if (!defined($ENV{'WEBMIN_VAR'})) {
4007 open(VARPATH, "$config_directory/var-path");
4008 chop($var_directory = <VARPATH>);
4012 $var_directory = $ENV{'WEBMIN_VAR'};
4014 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
4015 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
4017 if ($ENV{'SESSION_ID'}) {
4018 # Hide this variable from called programs, but keep it for internal use
4019 $main::session_id = $ENV{'SESSION_ID'};
4020 delete($ENV{'SESSION_ID'});
4022 if ($ENV{'REMOTE_PASS'}) {
4023 # Hide the password too
4024 $main::remote_pass = $ENV{'REMOTE_PASS'};
4025 delete($ENV{'REMOTE_PASS'});
4028 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
4029 # Looks like we are running setuid, but the real UID hasn't been set.
4030 # Do so now, so that executed programs don't get confused
4035 # Read the webmin global config file. This contains the OS type and version,
4036 # OS specific configuration and global options such as proxy servers
4037 $config_file = "$config_directory/config";
4039 &read_file_cached($config_file, \%gconfig);
4040 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
4041 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
4043 # Work out of this is a web, command line or cron job
4044 if (!$main::webmin_script_type) {
4045 if ($ENV{'SCRIPT_NAME'}) {
4047 $main::webmin_script_type = 'web';
4050 # Cron jobs have no TTY
4051 if ($gconfig{'os_type'} eq 'windows' ||
4052 open(DEVTTY, ">/dev/tty")) {
4053 $main::webmin_script_type = 'cmd';
4057 $main::webmin_script_type = 'cron';
4062 # If debugging is enabled, open the debug log
4063 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
4064 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
4065 if ($gconfig{'debug_size'}) {
4066 my @st = stat($dlog);
4067 if ($st[7] > $gconfig{'debug_size'}) {
4068 rename($dlog, $dlog.".0");
4071 open(main::DEBUGLOG, ">>$dlog");
4072 $main::opened_debug_log = 1;
4074 if ($gconfig{'debug_what_start'}) {
4075 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4076 $main::debug_log_start_time = time();
4077 &webmin_debug_log("START", "script=$script_name");
4078 $main::debug_log_start_module = $module_name;
4082 # Set PATH and LD_LIBRARY_PATH
4083 if ($gconfig{'path'}) {
4084 if ($gconfig{'syspath'}) {
4086 $ENV{'PATH'} = $gconfig{'path'};
4090 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
4093 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
4095 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
4096 if ($gconfig{'http_proxy'}) {
4097 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
4099 if ($gconfig{'ftp_proxy'}) {
4100 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
4102 if ($gconfig{'noproxy'}) {
4103 $ENV{'no_proxy'} = $gconfig{'noproxy'};
4106 # Find all root directories
4108 if (&get_miniserv_config(\%miniserv)) {
4109 @root_directories = ( $miniserv{'root'} );
4110 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
4111 push(@root_directories, $miniserv{"extraroot_$i"});
4115 # Work out which module we are in, and read the per-module config file
4116 $0 =~ s/\\/\//g; # Force consistent path on Windows
4117 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
4118 # In a foreign call - use the module name given
4119 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
4120 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
4121 @root_directories = ( $root_directory ) if (!@root_directories);
4123 elsif ($ENV{'SCRIPT_NAME'}) {
4124 my $sn = $ENV{'SCRIPT_NAME'};
4125 $sn =~ s/^$gconfig{'webprefix'}//
4126 if (!$gconfig{'webprefixnoredir'});
4127 if ($sn =~ /^\/([^\/]+)\//) {
4128 # Get module name from CGI path
4131 if ($ENV{'SERVER_ROOT'}) {
4132 $root_directory = $ENV{'SERVER_ROOT'};
4134 elsif ($ENV{'SCRIPT_FILENAME'}) {
4135 $root_directory = $ENV{'SCRIPT_FILENAME'};
4136 $root_directory =~ s/$sn$//;
4138 @root_directories = ( $root_directory ) if (!@root_directories);
4141 # Get root directory from miniserv.conf, and deduce module name from $0
4142 $root_directory = $root_directories[0];
4144 foreach my $r (@root_directories) {
4145 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
4146 # Under a module directory
4151 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
4157 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
4160 # Set the umask based on config
4161 if ($gconfig{'umask'} && !$main::umask_already++) {
4162 umask(oct($gconfig{'umask'}));
4165 # If this is a cron job or other background task, set the nice level
4166 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4168 if ($gconfig{'nice'}) {
4169 eval 'POSIX::nice($gconfig{\'nice\'});';
4172 # Set IO scheduling class and priority
4173 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4175 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4176 if ($gconfig{'sclass'} ne '');
4177 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4178 if ($gconfig{'sprio'} ne '');
4180 &execute_command("$cmd >/dev/null 2>&1");
4183 $main::nice_already++;
4186 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4187 $base_remote_user = $u;
4188 $remote_user = $ENV{'REMOTE_USER'};
4190 # Work out if user is definitely in the DB, and if so get his attrs
4191 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4192 %remote_user_attrs = ( );
4193 if ($remote_user_proto) {
4194 my $userdb = &get_userdb_string();
4195 my ($dbh, $proto, $prefix, $args) =
4196 $userdb ? &connect_userdb($userdb) : ( );
4198 if ($proto eq "mysql" || $proto eq "postgresql") {
4199 # Read attrs from SQL
4200 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
4201 if ($cmd && $cmd->execute($base_remote_user)) {
4202 while(my ($attr, $value) = $cmd->fetchrow()) {
4203 $remote_user_attrs{$attr} = $value;
4208 elsif ($proto eq "ldap") {
4209 # Read attrs from LDAP
4210 my $rv = $dbh->search(
4212 filter => '(&(cn='.$base_remote_user.')'.
4214 $args->{'userclass'}.'))',
4216 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4218 foreach $la ($u->get_value('webminAttr')) {
4219 my ($attr, $value) = split(/=/, $la, 2);
4220 $remote_user_attrs{$attr} = $value;
4224 &disconnect_userdb($userdb, $dbh);
4229 # Find and load the configuration file for this module
4230 my (@ruinfo, $rgroup);
4231 $module_config_directory = "$config_directory/$module_name";
4232 if (&get_product_name() eq "usermin" &&
4233 -r "$module_config_directory/config.$remote_user") {
4235 $module_config_file = "$module_config_directory/config.$remote_user";
4237 elsif (&get_product_name() eq "usermin" &&
4238 (@ruinfo = getpwnam($remote_user)) &&
4239 ($rgroup = getgrgid($ruinfo[3])) &&
4240 -r "$module_config_directory/config.\@$rgroup") {
4241 # Based on group name
4242 $module_config_file = "$module_config_directory/config.\@$rgroup";
4246 $module_config_file = "$module_config_directory/config";
4249 &read_file_cached($module_config_file, \%config);
4251 # Fix up windows-specific substitutions in values
4252 foreach my $k (keys %config) {
4253 if ($config{$k} =~ /\$\{systemroot\}/) {
4254 my $root = &get_windows_root();
4255 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4260 # Record the initial module
4261 $main::initial_module_name ||= $module_name;
4263 # Set some useful variables
4265 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4266 $gconfig{'mobile_theme'} :
4267 defined($remote_user_attrs{'theme'}) ?
4268 $remote_user_attrs{'theme'} :
4269 defined($gconfig{'theme_'.$remote_user}) ?
4270 $gconfig{'theme_'.$remote_user} :
4271 defined($gconfig{'theme_'.$base_remote_user}) ?
4272 $gconfig{'theme_'.$base_remote_user} :
4274 @current_themes = split(/\s+/, $current_themes);
4275 $current_theme = $current_themes[0];
4276 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4277 $theme_root_directory = $theme_root_directories[0];
4278 @theme_configs = ( );
4279 foreach my $troot (@theme_root_directories) {
4281 &read_file_cached("$troot/config", \%onetconfig);
4282 &read_file_cached("$troot/config", \%tconfig);
4283 push(@theme_configs, \%onetconfig);
4285 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4286 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4288 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4289 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4291 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4292 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4293 if ($tconfig{'preload_functions'}) {
4294 # Force load of theme functions right now, if requested
4295 &load_theme_library();
4297 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4298 # Load the theme's Webmin:: package classes
4299 do "$theme_root_directory/$tconfig{'oofunctions'}";
4304 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4305 : "$var_directory/webmin.log";
4307 # Load language strings into %text
4308 my @langs = &list_languages();
4310 if ($gconfig{'acceptlang'}) {
4311 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4312 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4314 $accepted_lang = $al->{'lang'};
4319 $current_lang = $force_lang ? $force_lang :
4320 $accepted_lang ? $accepted_lang :
4321 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4322 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4323 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4324 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4325 foreach my $l (@langs) {
4326 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4328 @lang_order_list = &unique($default_lang,
4329 split(/:/, $current_lang_info->{'fallback'}),
4331 %text = &load_language($module_name);
4332 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4334 # Get the %module_info for this module
4336 my ($mi) = grep { $_->{'dir'} eq $module_name }
4337 &get_all_module_infos(2);
4338 %module_info = %$mi;
4339 $module_root_directory = &module_root_directory($module_name);
4342 if ($module_name && !$main::no_acl_check &&
4343 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4344 # Check if the HTTP user can access this module
4345 if (!&foreign_available($module_name)) {
4346 if (!&foreign_check($module_name)) {
4347 &error(&text('emodulecheck',
4348 "<i>$module_info{'desc'}</i>"));
4351 &error(&text('emodule', "<i>$u</i>",
4352 "<i>$module_info{'desc'}</i>"));
4355 $main::no_acl_check++;
4358 # Check the Referer: header for nasty redirects
4359 my @referers = split(/\s+/, $gconfig{'referers'});
4361 my $r = $ENV{'HTTP_REFERER'};
4362 if ($r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?\[([^\]]+)\]/ ||
4363 $r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4366 my $http_host = $ENV{'HTTP_HOST'};
4367 $http_host =~ s/:\d+$//;
4368 $http_host =~ s/^\[(\S+)\]$/$1/;
4369 my $unsafe_index = $unsafe_index_cgi ||
4370 &get_module_variable('$unsafe_index_cgi');
4372 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4373 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4375 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4376 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4377 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4378 ($referer_site && $referer_site ne $http_host &&
4379 &indexof($referer_site, @referers) < 0 ||
4380 !$referer_site && $gconfig{'referers_none'}) &&
4381 !$trust_unknown_referers &&
4382 !&get_module_variable('$trust_unknown_referers')) {
4383 # Looks like a link from elsewhere .. show an error
4384 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4386 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4387 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4388 if ($referer_site) {
4390 print &text('referer_warn',
4391 "<tt>".&html_escape($r)."</tt>", $url);
4393 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4394 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4397 # No referer info given
4398 print &text('referer_warn_unknown', $url),"<p>\n";
4399 print &text('referer_fix1u'),"<p>\n";
4400 print &text('referer_fix2u'),"<p>\n";
4404 &footer("/", $text{'index'});
4407 $main::no_referers_check++;
4408 $main::completed_referers_check++;
4410 # Call theme post-init
4411 if (defined(&theme_post_init_config)) {
4412 &theme_post_init_config(@_);
4415 # Record that we have done the calling library in this package
4416 my ($callpkg, $lib) = caller();
4418 $main::done_foreign_require{$callpkg,$lib} = 1;
4420 # If a licence checking is enabled, do it now
4421 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4422 &foreign_check($gconfig{'licence_module'}) &&
4423 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4424 my $oldpwd = &get_current_dir();
4425 $main::done_licence_module_check++;
4426 $main::licence_module = $gconfig{'licence_module'};
4427 &foreign_require($main::licence_module, "licence_check.pl");
4428 ($main::licence_status, $main::licence_message) =
4429 &foreign_call($main::licence_module, "check_licence");
4433 # Export global variables to caller
4434 if ($main::export_to_caller) {
4435 foreach my $v ('$config_file', '%gconfig', '$null_file',
4436 '$path_separator', '@root_directories',
4437 '$root_directory', '$module_name',
4438 '$base_remote_user', '$remote_user',
4439 '$remote_user_proto', '%remote_user_attrs',
4440 '$module_config_directory', '$module_config_file',
4441 '%config', '@current_themes', '$current_theme',
4442 '@theme_root_directories', '$theme_root_directory',
4443 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4444 '$webmin_logfile', '$current_lang',
4445 '$current_lang_info', '@lang_order_list', '%text',
4446 '%module_info', '$module_root_directory') {
4447 my ($vt, $vn) = split('', $v, 2);
4448 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4455 =head2 load_language([module], [directory])
4457 Returns a hashtable mapping text codes to strings in the appropriate language,
4458 based on the $current_lang global variable, which is in turn set based on
4459 the Webmin user's selection. The optional module parameter tells the function
4460 which module to load strings for, and defaults to the calling module. The
4461 optional directory parameter can be used to load strings from a directory
4464 In regular module development you will never need to call this function
4465 directly, as init_config calls it for you, and places the module's strings
4466 into the %text hash.
4472 my $root = $root_directory;
4473 my $ol = $gconfig{'overlang'};
4474 my ($dir) = ($_[1] || "lang");
4476 # Read global lang files
4477 foreach my $o (@lang_order_list) {
4478 my $ok = &read_file_cached_with_stat("$root/$dir/$o", \%text);
4479 return () if (!$ok && $o eq $default_lang);
4482 foreach my $o (@lang_order_list) {
4483 &read_file_cached("$root/$ol/$o", \%text);
4486 &read_file_cached("$config_directory/custom-lang", \%text);
4487 foreach my $o (@lang_order_list) {
4488 next if ($o eq "en");
4489 &read_file_cached("$config_directory/custom-lang.$o", \%text);
4491 my $norefs = $text{'__norefs'};
4494 # Read module's lang files
4495 delete($text{'__norefs'});
4496 my $mdir = &module_root_directory($_[0]);
4497 foreach my $o (@lang_order_list) {
4498 &read_file_cached_with_stat("$mdir/$dir/$o", \%text);
4501 foreach my $o (@lang_order_list) {
4502 &read_file_cached("$mdir/$ol/$o", \%text);
4505 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4506 foreach my $o (@lang_order_list) {
4507 next if ($o eq "en");
4508 &read_file_cached("$config_directory/$_[0]/custom-lang.$o",
4511 $norefs = $text{'__norefs'} if ($norefs);
4514 # Replace references to other strings
4516 foreach $k (keys %text) {
4517 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4521 if (defined(&theme_load_language)) {
4522 &theme_load_language(\%text, $_[0]);
4527 =head2 text_subs(string)
4529 Used internally by load_language to expand $code substitutions in language
4535 if (substr($_[0], 0, 8) eq "include:") {
4538 open(INCLUDE, substr($_[0], 8));
4546 my $t = $_[1]->{$_[0]};
4547 return defined($t) ? $t : '$'.$_[0];
4551 =head2 text(message, [substitute]+)
4553 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4554 the substitute parameters. This makes it easy to use strings with placeholders
4555 that get replaced with programmatically generated text. For example :
4557 print &text('index_hello', $remote_user),"<p>\n";
4562 my $t = &get_module_variable('%text', 1);
4563 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4564 for(my $i=1; $i<@_; $i++) {
4565 $rv =~ s/\$$i/$_[$i]/g;
4570 =head2 encode_base64(string)
4572 Encodes a string into base64 format, for use in MIME email or HTTP
4573 authorization headers.
4579 pos($_[0]) = 0; # ensure start at the beginning
4580 while ($_[0] =~ /(.{1,57})/gs) {
4581 $res .= substr(pack('u57', $1), 1)."\n";
4584 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4585 my $padding = (3 - length($_[0]) % 3) % 3;
4586 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4590 =head2 decode_base64(string)
4592 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4599 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4600 if (length($str) % 4) {
4603 $str =~ s/=+$//; # remove padding
4604 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4605 while ($str =~ /(.{1,60})/gs) {
4606 my $len = chr(32 + length($1)*3/4); # compute length byte
4607 $res .= unpack("u", $len . $1 ); # uudecode
4612 =head2 get_module_info(module, [noclone], [forcache])
4614 Returns a hash containg details of the given module. Some useful keys are :
4616 =item dir - The module directory, like sendmail.
4618 =item desc - Human-readable description, in the current users' language.
4620 =item version - Optional module version number.
4622 =item os_support - List of supported operating systems and versions.
4624 =item category - Category on Webmin's left menu, like net.
4629 return () if ($_[0] =~ /^\./);
4630 my (%rv, $clone, $o);
4631 my $mdir = &module_root_directory($_[0]);
4632 &read_file_cached("$mdir/module.info", \%rv) || return ();
4634 # A clone is a module that links to another directory under the root
4635 foreach my $r (@root_directories) {
4636 if (&is_under_directory($r, $mdir)) {
4642 foreach $o (@lang_order_list) {
4643 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4644 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4646 if ($clone && !$_[1] && $config_directory) {
4647 $rv{'clone'} = $rv{'desc'};
4648 &read_file("$config_directory/$_[0]/clone", \%rv);
4651 my %module_categories;
4652 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4653 my $pn = &get_product_name();
4654 if (defined($rv{'category_'.$pn})) {
4655 # Can override category for webmin/usermin
4656 $rv{'category'} = $rv{'category_'.$pn};
4658 $rv{'realcategory'} = $rv{'category'};
4659 $rv{'category'} = $module_categories{$_[0]}
4660 if (defined($module_categories{$_[0]}));
4662 # Apply description overrides
4663 $rv{'realdesc'} = $rv{'desc'};
4665 &read_file_cached("$config_directory/webmin.descs", \%descs);
4666 if ($descs{$_[0]}) {
4667 $rv{'desc'} = $descs{$_[0]};
4669 foreach my $o (@lang_order_list) {
4670 my $ov = $descs{$_[0]." ".$o} || $descs{$_[0]."_".$o};
4671 $rv{'desc'} = $ov if ($ov);
4675 # Apply per-user description overridde
4676 my %gaccess = &get_module_acl(undef, "");
4677 if ($gaccess{'desc_'.$_[0]}) {
4678 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4682 if ($rv{'longdesc'}) {
4683 # All standard modules have an index.cgi
4684 $rv{'index_link'} = 'index.cgi';
4687 # Call theme-specific override function
4688 if (defined(&theme_get_module_info)) {
4689 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4695 =head2 get_all_module_infos(cachemode)
4697 Returns a list contains the information on all modules in this webmin
4698 install, including clones. Uses caching to reduce the number of module.info
4699 files that need to be read. Each element of the array is a hash reference
4700 in the same format as returned by get_module_info. The cache mode flag can be :
4701 0 = read and write, 1 = don't read or write, 2 = read only
4704 sub get_all_module_infos
4708 # Is the cache out of date? (ie. have any of the root's changed?)
4709 my $cache_file = "$config_directory/module.infos.cache";
4711 if (&read_file_cached($cache_file, \%cache)) {
4712 foreach my $r (@root_directories) {
4714 if ($st[9] != $cache{'mtime_'.$r}) {
4724 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4725 # Can use existing module.info cache
4727 foreach my $k (keys %cache) {
4728 if ($k =~ /^(\S+) (\S+)$/) {
4729 $mods{$1}->{$2} = $cache{$k};
4732 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4735 # Need to rebuild cache
4737 foreach my $r (@root_directories) {
4739 foreach my $m (readdir(DIR)) {
4740 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4741 my %minfo = &get_module_info($m, 0, 1);
4742 next if (!%minfo || !$minfo{'dir'});
4744 foreach $k (keys %minfo) {
4745 $cache{"${m} ${k}"} = $minfo{$k};
4750 $cache{'mtime_'.$r} = $st[9];
4752 $cache{'lang'} = $current_lang;
4753 if (!$_[0] && $< == 0 && $> == 0) {
4755 # Don't fail if cache write fails
4756 local $main::error_must_die = 1;
4757 &write_file($cache_file, \%cache);
4762 # Override descriptions for modules for current user
4763 my %gaccess = &get_module_acl(undef, "");
4764 foreach my $m (@rv) {
4765 if ($gaccess{"desc_".$m->{'dir'}}) {
4766 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4770 # Apply installed flags
4772 &read_file_cached("$config_directory/installed.cache", \%installed);
4773 foreach my $m (@rv) {
4774 $m->{'installed'} = $installed{$m->{'dir'}};
4780 =head2 get_theme_info(theme)
4782 Returns a hash containing a theme's details, taken from it's theme.info file.
4783 Some useful keys are :
4785 =item dir - The theme directory, like blue-theme.
4787 =item desc - Human-readable description, in the current users' language.
4789 =item version - Optional module version number.
4791 =item os_support - List of supported operating systems and versions.
4796 return () if ($_[0] =~ /^\./);
4798 my $tdir = &module_root_directory($_[0]);
4799 &read_file("$tdir/theme.info", \%rv) || return ();
4800 foreach my $o (@lang_order_list) {
4801 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4807 =head2 list_languages
4809 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4810 Each is a hash reference with the following keys :
4812 =item lang - The short language code, like es for Spanish.
4814 =item desc - A human-readable description, in English.
4816 =item charset - An optional character set to use when displaying the language.
4818 =item titles - Set to 1 only if Webmin has title images for the language.
4820 =item fallback - The code for another language to use if a string does not exist in this one. For all languages, English is the ultimate fallback.
4825 if (!@main::list_languages_cache) {
4828 open(LANG, "$root_directory/lang_list.txt");
4830 if (/^(\S+)\s+(.*)/) {
4831 my $l = { 'desc' => $2 };
4832 foreach $o (split(/,/, $1)) {
4833 if ($o =~ /^([^=]+)=(.*)$/) {
4837 $l->{'index'} = scalar(@rv);
4838 push(@main::list_languages_cache, $l);
4842 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4843 @main::list_languages_cache;
4845 return @main::list_languages_cache;
4848 =head2 read_env_file(file, &hash, [include-commented])
4850 Similar to Webmin's read_file function, but handles files containing shell
4851 environment variables formatted like :
4856 The file parameter is the full path to the file to read, and hash a Perl hash
4857 ref to read names and values into.
4863 &open_readfile(FILE, $_[0]) || return 0;
4866 # Remove start of line comments
4870 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4871 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4872 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4880 =head2 write_env_file(file, &hash, [export])
4882 Writes out a hash to a file in name='value' format, suitable for use in a shell
4883 script. The parameters are :
4885 =item file - Full path for a file to write to
4887 =item hash - Hash reference of names and values to write.
4889 =item export - If set to 1, preceed each variable setting with the word 'export'.
4894 my $exp = $_[2] ? "export " : "";
4895 &open_tempfile(FILE, ">$_[0]");
4896 foreach my $k (keys %{$_[1]}) {
4897 my $v = $_[1]->{$k};
4898 if ($v =~ /^\S+$/) {
4899 &print_tempfile(FILE, "$exp$k=$v\n");
4902 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4905 &close_tempfile(FILE);
4908 =head2 lock_file(filename, [readonly], [forcefile])
4910 Lock a file for exclusive access. If the file is already locked, spin
4911 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4912 to work OK. The parameters are :
4914 =item filename - File or directory to lock.
4916 =item readonly - If set, the lock is for reading the file only. More than one script can have a readonly lock, but only one can hold a write lock.
4918 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4923 my $realfile = &translate_filename($_[0]);
4924 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4925 my $no_lock = !&can_lock_file($realfile);
4926 my $lock_tries_count = 0;
4929 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4934 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4937 # Create the .lock file
4938 open(LOCKING, ">$realfile.lock") || return 0;
4939 my $lck = eval "flock(LOCKING, 2+4)";
4941 # Lock of lock file failed! Wait till later
4944 print LOCKING $$,"\n";
4945 eval "flock(LOCKING, 8)";
4948 $main::locked_file_list{$realfile} = int($_[1]);
4949 push(@main::temporary_files, "$realfile.lock");
4950 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4951 !&get_module_variable('$no_log_file_changes') &&
4953 # Grab a copy of this file for later diffing
4955 $main::locked_file_data{$realfile} = undef;
4957 $main::locked_file_type{$realfile} = 1;
4958 $main::locked_file_data{$realfile} = '';
4960 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4961 $main::locked_file_type{$realfile} = 2;
4962 $main::locked_file_data{$realfile} = $lnk;
4964 elsif (open(ORIGFILE, $realfile)) {
4965 $main::locked_file_type{$realfile} = 0;
4966 $main::locked_file_data{$realfile} = '';
4969 $main::locked_file_data{$realfile} .=$_;
4978 if ($lock_tries_count++ > 5*60) {
4979 # Give up after 5 minutes
4980 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4986 =head2 unlock_file(filename)
4988 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4989 file changes is enabled, then at unlock file a diff will be taken between the
4990 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4991 called. This can then be viewed in the Webmin Actions Log module.
4996 my $realfile = &translate_filename($_[0]);
4997 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4998 unlink("$realfile.lock") if (&can_lock_file($realfile));
4999 delete($main::locked_file_list{$realfile});
5000 if (exists($main::locked_file_data{$realfile})) {
5001 # Diff the new file with the old
5003 my $lnk = readlink($realfile);
5004 my $type = -d _ ? 1 : $lnk ? 2 : 0;
5005 my $oldtype = $main::locked_file_type{$realfile};
5006 my $new = !defined($main::locked_file_data{$realfile});
5007 if ($new && !-e _) {
5008 # file doesn't exist, and never did! do nothing ..
5010 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
5011 # is (or was) a directory ..
5012 if (-d _ && !defined($main::locked_file_data{$realfile})) {
5013 push(@main::locked_file_diff,
5014 { 'type' => 'mkdir', 'object' => $realfile });
5016 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
5017 push(@main::locked_file_diff,
5018 { 'type' => 'rmdir', 'object' => $realfile });
5021 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
5022 # is (or was) a symlink ..
5023 if ($lnk && !defined($main::locked_file_data{$realfile})) {
5024 push(@main::locked_file_diff,
5025 { 'type' => 'symlink', 'object' => $realfile,
5028 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
5029 push(@main::locked_file_diff,
5030 { 'type' => 'unsymlink', 'object' => $realfile,
5031 'data' => $main::locked_file_data{$realfile} });
5033 elsif ($lnk ne $main::locked_file_data{$realfile}) {
5034 push(@main::locked_file_diff,
5035 { 'type' => 'resymlink', 'object' => $realfile,
5040 # is a file, or has changed type?!
5041 my ($diff, $delete_file);
5042 my $type = "modify";
5044 open(NEWFILE, ">$realfile");
5049 if (!defined($main::locked_file_data{$realfile})) {
5052 open(ORIGFILE, ">$realfile.webminorig");
5053 print ORIGFILE $main::locked_file_data{$realfile};
5055 $diff = &backquote_command(
5056 "diff ".quotemeta("$realfile.webminorig")." ".
5057 quotemeta($realfile)." 2>/dev/null");
5058 push(@main::locked_file_diff,
5059 { 'type' => $type, 'object' => $realfile,
5060 'data' => $diff } ) if ($diff);
5061 unlink("$realfile.webminorig");
5062 unlink($realfile) if ($delete_file);
5065 if ($gconfig{'logfullfiles'}) {
5066 # Add file details to list of those to fully log
5067 $main::orig_file_data{$realfile} ||=
5068 $main::locked_file_data{$realfile};
5069 $main::orig_file_type{$realfile} ||=
5070 $main::locked_file_type{$realfile};
5073 delete($main::locked_file_data{$realfile});
5074 delete($main::locked_file_type{$realfile});
5078 =head2 test_lock(file)
5080 Returns 1 if some file is currently locked, 0 if not.
5085 my $realfile = &translate_filename($_[0]);
5086 return 0 if (!$_[0]);
5087 return 1 if (defined($main::locked_file_list{$realfile}));
5088 return 0 if (!&can_lock_file($realfile));
5090 if (open(LOCKING, "$realfile.lock")) {
5095 return $pid && kill(0, $pid);
5098 =head2 unlock_all_files
5100 Unlocks all files locked by the current script.
5103 sub unlock_all_files
5105 foreach $f (keys %main::locked_file_list) {
5110 =head2 can_lock_file(file)
5112 Returns 1 if some file should be locked, based on the settings in the
5113 Webmin Configuration module. For internal use by lock_file only.
5118 if (&is_readonly_mode()) {
5119 return 0; # never lock in read-only mode
5121 elsif ($gconfig{'lockmode'} == 0) {
5124 elsif ($gconfig{'lockmode'} == 1) {
5128 # Check if under any of the directories
5130 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
5131 if (&same_file($d, $_[0]) ||
5132 &is_under_directory($d, $_[0])) {
5136 return $gconfig{'lockmode'} == 2 ? $match : !$match;
5140 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
5142 Log some action taken by a user. This is typically called at the end of a
5143 script, once all file changes are complete and all commands run. The
5146 =item action - A short code for the action being performed, like 'create'.
5148 =item type - A code for the type of object the action is performed to, like 'user'.
5150 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
5152 =item params - A hash ref of additional information about the action.
5154 =item module - Name of the module in which the action was performed, which defaults to the current module.
5156 =item host - Remote host on which the action was performed. You should never need to set this (or the following two parameters), as they are used only for remote Webmin logging.
5158 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
5160 =item client-ip - IP address of the browser that performed the action.
5165 return if (!$gconfig{'log'} || &is_readonly_mode());
5166 my $m = $_[4] ? $_[4] : &get_module_name();
5168 if ($gconfig{'logclear'}) {
5169 # check if it is time to clear the log
5170 my @st = stat("$webmin_logfile.time");
5171 my $write_logtime = 0;
5173 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
5174 # clear logfile and all diff files
5175 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
5176 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
5177 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
5178 unlink($webmin_logfile);
5185 if ($write_logtime) {
5186 open(LOGTIME, ">$webmin_logfile.time");
5187 print LOGTIME time(),"\n";
5192 # If an action script directory is defined, call the appropriate scripts
5193 if ($gconfig{'action_script_dir'}) {
5194 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
5195 my ($basedir) = $gconfig{'action_script_dir'};
5197 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
5200 opendir(DIR, $dir) or die "Can't open $dir: $!";
5201 while (defined($file = readdir(DIR))) {
5202 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
5203 if (-x "$dir/$file") {
5204 # Call a script notifying it of the action
5206 $ENV{'ACTION_MODULE'} = &get_module_name();
5207 $ENV{'ACTION_ACTION'} = $_[0];
5208 $ENV{'ACTION_TYPE'} = $_[1];
5209 $ENV{'ACTION_OBJECT'} = $_[2];
5210 $ENV{'ACTION_SCRIPT'} = $script_name;
5211 foreach my $p (keys %param) {
5212 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5214 system("$dir/$file", @_,
5215 "<$null_file", ">$null_file", "2>&1");
5223 # should logging be done at all?
5224 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5225 split(/\s+/, $gconfig{'logusers'})) < 0);
5226 return if ($gconfig{'logmodules'} && &indexof($m,
5227 split(/\s+/, $gconfig{'logmodules'})) < 0);
5231 my @tm = localtime($now);
5232 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5233 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5234 my $idprefix = substr($now, 0, 5);
5235 $main::action_id_count++;
5236 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5237 $id, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5238 $tm[2], $tm[1], $tm[0],
5239 $remote_user || '-',
5240 $main::session_id || '-',
5241 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5242 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5243 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5245 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5246 my $v = $_[3]->{$k};
5252 elsif (ref($v) eq 'ARRAY') {
5256 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5257 $line .= " $k='$vv'";
5261 foreach $vv (split(/\0/, $v)) {
5263 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5264 $line .= " $k='$vv'";
5267 $param{$k} = join(" ", @pv);
5269 open(WEBMINLOG, ">>$webmin_logfile");
5270 print WEBMINLOG $line,"\n";
5272 if ($gconfig{'logperms'}) {
5273 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5276 chmod(0600, $webmin_logfile);
5279 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5280 # Find and record the changes made to any locked files, or commands run
5282 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5283 foreach my $d (@main::locked_file_diff) {
5284 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$idprefix", 0700);
5285 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id", 0700);
5286 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i");
5287 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5288 print DIFFLOG $d->{'data'};
5290 if ($d->{'input'}) {
5292 ">$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i.input");
5293 print DIFFLOG $d->{'input'};
5296 if ($gconfig{'logperms'}) {
5297 chmod(oct($gconfig{'logperms'}),
5298 "$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i",
5299 "$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i.input");
5303 @main::locked_file_diff = undef;
5306 if ($gconfig{'logfullfiles'}) {
5307 # Save the original contents of any modified files
5309 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5310 foreach my $f (keys %main::orig_file_data) {
5311 mkdir("$ENV{'WEBMIN_VAR'}/files/$idprefix", 0700);
5312 mkdir("$ENV{'WEBMIN_VAR'}/files/$idprefix/$id", 0700);
5313 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$idprefix/$id/$i");
5314 if (!defined($main::orig_file_type{$f})) {
5315 print ORIGLOG -1," ",$f,"\n";
5318 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5320 print ORIGLOG $main::orig_file_data{$f};
5322 if ($gconfig{'logperms'}) {
5323 chmod(oct($gconfig{'logperms'}),
5324 "$ENV{'WEBMIN_VAR'}/files/$idprefix/$id.$i");
5328 %main::orig_file_data = undef;
5329 %main::orig_file_type = undef;
5332 if ($miniserv::page_capture_out) {
5333 # Save the whole page output
5334 mkdir("$ENV{'WEBMIN_VAR'}/output", 0700);
5335 mkdir("$ENV{'WEBMIN_VAR'}/output/$idprefix", 0700);
5336 open(PAGEOUT, ">$ENV{'WEBMIN_VAR'}/output/$idprefix/$id");
5337 print PAGEOUT $miniserv::page_capture_out;
5339 if ($gconfig{'logperms'}) {
5340 chmod(oct($gconfig{'logperms'}),
5341 "$ENV{'WEBMIN_VAR'}/output/$idprefix/$id");
5343 $miniserv::page_capture_out = undef;
5347 if ($gconfig{'logsyslog'}) {
5348 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5349 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5350 setlogsock("inet");';
5352 # Syslog module is installed .. try to convert to a
5353 # human-readable form
5355 my $mod = &get_module_name();
5356 my $mdir = module_root_directory($mod);
5357 if (-r "$mdir/log_parser.pl") {
5358 &foreign_require($mod, "log_parser.pl");
5360 foreach my $k (keys %{$_[3]}) {
5361 my $v = $_[3]->{$k};
5362 if (ref($v) eq 'ARRAY') {
5363 $params{$k} = join("\0", @$v);
5369 $msg = &foreign_call($mod, "parse_webmin_log",
5370 $remote_user, $script_name,
5371 $_[0], $_[1], $_[2], \%params);
5372 $msg =~ s/<[^>]*>//g; # Remove tags
5374 elsif ($_[0] eq "_config_") {
5375 my %wtext = &load_language("webminlog");
5376 $msg = $wtext{'search_config'};
5378 $msg ||= "$_[0] $_[1] $_[2]";
5379 my %info = &get_module_info($m);
5380 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5385 =head2 additional_log(type, object, data, [input])
5387 Records additional log data for an upcoming call to webmin_log, such
5388 as a command that was run or SQL that was executed. Typically you will never
5389 need to call this function directory.
5394 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5395 push(@main::locked_file_diff,
5396 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5397 'input' => $_[3] } );
5401 =head2 webmin_debug_log(type, message)
5403 Write something to the Webmin debug log. For internal use only.
5406 sub webmin_debug_log
5408 my ($type, $msg) = @_;
5409 return 0 if (!$main::opened_debug_log);
5410 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5411 if ($gconfig{'debug_modules'}) {
5412 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5413 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5416 eval 'use Time::HiRes qw(gettimeofday); ($now, $ms) = gettimeofday';
5418 my @tm = localtime($now);
5420 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d.%6.6d] %s %s %s %s \"%s\"",
5421 $$, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5422 $tm[2], $tm[1], $tm[0], $ms,
5423 $remote_user || "-",
5424 $ENV{'REMOTE_HOST'} || "-",
5425 &get_module_name() || "-",
5428 seek(main::DEBUGLOG, 0, 2);
5429 print main::DEBUGLOG $line."\n";
5433 =head2 system_logged(command)
5435 Just calls the Perl system() function, but also logs the command run.
5440 if (&is_readonly_mode()) {
5441 print STDERR "Vetoing command $_[0]\n";
5444 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5445 my $cmd = join(" ", @realcmd);
5447 if ($cmd =~ s/(\s*&\s*)$//) {
5450 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5451 $cmd =~ s/^\((.*)\)\s*$/$1/;
5453 &additional_log('exec', undef, $cmd);
5454 return system(@realcmd);
5457 =head2 backquote_logged(command)
5459 Executes a command and returns the output (like `command`), but also logs it.
5462 sub backquote_logged
5464 if (&is_readonly_mode()) {
5466 print STDERR "Vetoing command $_[0]\n";
5469 my $realcmd = &translate_command($_[0]);
5472 if ($cmd =~ s/(\s*&\s*)$//) {
5475 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5476 $cmd =~ s/^\((.*)\)\s*$/$1/;
5478 &additional_log('exec', undef, $cmd);
5479 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5483 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5485 Runs some command, waiting at most the given number of seconds for it to
5486 complete, and returns the output. The maxlines parameter sets the number
5487 of lines of output to capture. The safe parameter should be set to 1 if the
5488 command is safe for read-only mode users to run.
5491 sub backquote_with_timeout
5493 my $realcmd = &translate_command($_[0]);
5494 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5495 if ($gconfig{'debug_what_cmd'});
5497 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5502 my $elapsed = time() - $start;
5503 last if ($elapsed > $_[1]);
5505 vec($rmask, fileno(OUT), 1) = 1;
5506 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5507 last if (!$sel || $sel < 0);
5509 last if (!defined($line));
5512 if ($_[3] && $linecount >= $_[3]) {
5517 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5521 return wantarray ? ($out, $timed_out) : $out;
5524 =head2 backquote_command(command, safe?)
5526 Executes a command and returns the output (like `command`), subject to
5527 command translation. The safe parameter should be set to 1 if the command
5528 is safe for read-only mode users to run.
5531 sub backquote_command
5533 if (&is_readonly_mode() && !$_[1]) {
5534 print STDERR "Vetoing command $_[0]\n";
5538 my $realcmd = &translate_command($_[0]);
5539 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5543 =head2 kill_logged(signal, pid, ...)
5545 Like Perl's built-in kill function, but also logs the fact that some process
5546 was killed. On Windows, falls back to calling process.exe to terminate a
5552 return scalar(@_)-1 if (&is_readonly_mode());
5553 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5554 if ($gconfig{'debug_what_procs'});
5555 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5556 if ($gconfig{'os_type'} eq 'windows') {
5557 # Emulate some kills with process.exe
5558 my $arg = $_[0] eq "KILL" ? "-k" :
5559 $_[0] eq "TERM" ? "-q" :
5560 $_[0] eq "STOP" ? "-s" :
5561 $_[0] eq "CONT" ? "-r" : undef;
5563 foreach my $p (@_[1..@_-1]) {
5565 $ok ||= kill($_[0], $p);
5568 &execute_command("process $arg $p");
5580 =head2 rename_logged(old, new)
5582 Re-names a file and logs the rename. If the old and new files are on different
5583 filesystems, calls mv or the Windows rename function to do the job.
5588 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5589 return &rename_file($_[0], $_[1]);
5592 =head2 rename_file(old, new)
5594 Renames a file or directory. If the old and new files are on different
5595 filesystems, calls mv or the Windows rename function to do the job.
5600 if (&is_readonly_mode()) {
5601 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5604 my $src = &translate_filename($_[0]);
5605 my $dst = &translate_filename($_[1]);
5606 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5607 if ($gconfig{'debug_what_ops'});
5608 my $ok = rename($src, $dst);
5609 if (!$ok && $! !~ /permission/i) {
5610 # Try the mv command, in case this is a cross-filesystem rename
5611 if ($gconfig{'os_type'} eq 'windows') {
5612 # Need to use rename
5613 my $out = &backquote_command("rename ".quotemeta($_[0]).
5614 " ".quotemeta($_[1])." 2>&1");
5616 $! = $out if (!$ok);
5620 my $out = &backquote_command("mv ".quotemeta($_[0]).
5621 " ".quotemeta($_[1])." 2>&1");
5623 $! = $out if (!$ok);
5629 =head2 symlink_logged(src, dest)
5631 Create a symlink, and logs it. Effectively does the same thing as the Perl
5638 my $rv = &symlink_file($_[0], $_[1]);
5639 &unlock_file($_[1]);
5643 =head2 symlink_file(src, dest)
5645 Creates a soft link, unless in read-only mode. Effectively does the same thing
5646 as the Perl symlink function.
5651 if (&is_readonly_mode()) {
5652 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5655 my $src = &translate_filename($_[0]);
5656 my $dst = &translate_filename($_[1]);
5657 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5658 if ($gconfig{'debug_what_ops'});
5659 return symlink($src, $dst);
5662 =head2 link_file(src, dest)
5664 Creates a hard link, unless in read-only mode. The existing new link file
5665 will be deleted if necessary. Effectively the same as Perl's link function.
5670 if (&is_readonly_mode()) {
5671 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5674 my $src = &translate_filename($_[0]);
5675 my $dst = &translate_filename($_[1]);
5676 &webmin_debug_log('LINK', "src=$src dst=$dst")
5677 if ($gconfig{'debug_what_ops'});
5678 unlink($dst); # make sure link works
5679 return link($src, $dst);
5682 =head2 make_dir(dir, perms, recursive)
5684 Creates a directory and sets permissions on it, unless in read-only mode.
5685 The perms parameter sets the octal permissions to apply, which unlike Perl's
5686 mkdir will really get set. The recursive flag can be set to 1 to have the
5687 function create parent directories too.
5692 my ($dir, $perms, $recur) = @_;
5693 if (&is_readonly_mode()) {
5694 print STDERR "Vetoing directory $dir\n";
5697 $dir = &translate_filename($dir);
5698 my $exists = -d $dir ? 1 : 0;
5699 return 1 if ($exists && $recur); # already exists
5700 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5701 my $rv = mkdir($dir, $perms);
5702 if (!$rv && $recur) {
5703 # Failed .. try mkdir -p
5704 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5705 my $ex = &execute_command("mkdir $param "."e_path($dir));
5711 chmod($perms, $dir);
5716 =head2 set_ownership_permissions(user, group, perms, file, ...)
5718 Sets the user, group owner and permissions on some files. The parameters are :
5720 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5722 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5724 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5726 =item file - One or more files or directories to modify.
5729 sub set_ownership_permissions
5731 my ($user, $group, $perms, @files) = @_;
5732 if (&is_readonly_mode()) {
5733 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5736 @files = map { &translate_filename($_) } @files;
5737 if ($gconfig{'debug_what_ops'}) {
5738 foreach my $f (@files) {
5739 &webmin_debug_log('PERMS',
5740 "file=$f user=$user group=$group perms=$perms");
5744 if (defined($user)) {
5745 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5747 if (defined($group)) {
5748 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5751 my @uinfo = getpwuid($uid);
5754 $rv = chown($uid, $gid, @files);
5756 if ($rv && defined($perms)) {
5757 $rv = chmod($perms, @files);
5762 =head2 unlink_logged(file, ...)
5764 Like Perl's unlink function, but locks the files beforehand and un-locks them
5765 after so that the deletion is logged by Webmin.
5771 foreach my $f (@_) {
5772 if (!&test_lock($f)) {
5777 my @rv = &unlink_file(@_);
5778 foreach my $f (@_) {
5783 return wantarray ? @rv : $rv[0];
5786 =head2 unlink_file(file, ...)
5788 Deletes some files or directories. Like Perl's unlink function, but also
5789 recursively deletes directories with the rm command if needed.
5794 return 1 if (&is_readonly_mode());
5797 foreach my $f (@_) {
5798 &unflush_file_lines($f);
5799 my $realf = &translate_filename($f);
5800 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5802 if (!rmdir($realf)) {
5804 if ($gconfig{'os_type'} eq 'windows') {
5805 # Call del and rmdir commands
5808 my $out = `del /q "$qm" 2>&1`;
5810 $out = `rmdir "$qm" 2>&1`;
5815 my $qm = quotemeta($realf);
5816 $out = `rm -rf $qm 2>&1`;
5825 if (!unlink($realf)) {
5831 return wantarray ? ($rv, $err) : $rv;
5834 =head2 copy_source_dest(source, dest)
5836 Copy some file or directory to a new location. Returns 1 on success, or 0
5837 on failure - also sets $! on failure. If the source is a directory, uses
5838 piped tar commands to copy a whole directory structure including permissions
5842 sub copy_source_dest
5844 return (1, undef) if (&is_readonly_mode());
5845 my ($src, $dst) = @_;
5848 &webmin_debug_log('COPY', "src=$src dst=$dst")
5849 if ($gconfig{'debug_what_ops'});
5850 if ($gconfig{'os_type'} eq 'windows') {
5851 # No tar or cp on windows, so need to use copy command
5855 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5858 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5866 # A directory .. need to copy with tar command
5867 my @st = stat($src);
5870 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5871 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5878 # Can just copy with cp
5879 my $out = &backquote_logged("cp -p ".quotemeta($src).
5880 " ".quotemeta($dst)." 2>&1");
5886 return wantarray ? ($ok, $err) : $ok;
5889 =head2 remote_session_name(host|&server)
5891 Generates a session ID for some server. For this server, this will always
5892 be an empty string. For a server object it will include the hostname and
5893 port and PID. For a server name, it will include the hostname and PID. For
5897 sub remote_session_name
5899 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5900 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5901 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5902 ref($_[0]) ? "" : "$_[0].$$";
5905 =head2 remote_foreign_require(server, module, file)
5907 Connects to rpc.cgi on a remote webmin server and have it open a session
5908 to a process that will actually do the require and run functions. This is the
5909 equivalent for foreign_require, but for a remote Webmin system. The server
5910 parameter can either be a hostname of a system registered in the Webmin
5911 Servers Index module, or a hash reference for a system from that module.
5914 sub remote_foreign_require
5916 my $call = { 'action' => 'require',
5919 my $sn = &remote_session_name($_[0]);
5920 if ($remote_session{$sn}) {
5921 $call->{'session'} = $remote_session{$sn};
5924 $call->{'newsession'} = 1;
5926 my $rv = &remote_rpc_call($_[0], $call);
5927 if ($rv->{'session'}) {
5928 $remote_session{$sn} = $rv->{'session'};
5929 $remote_session_server{$sn} = $_[0];
5933 =head2 remote_foreign_call(server, module, function, [arg]*)
5935 Call a function on a remote server. Must have been setup first with
5936 remote_foreign_require for the same server and module. Equivalent to
5937 foreign_call, but with the extra server parameter to specify the remote
5941 sub remote_foreign_call
5943 return undef if (&is_readonly_mode());
5944 my $sn = &remote_session_name($_[0]);
5945 return &remote_rpc_call($_[0], { 'action' => 'call',
5948 'session' => $remote_session{$sn},
5949 'args' => [ @_[3 .. $#_] ] } );
5952 =head2 remote_foreign_check(server, module, [api-only])
5954 Checks if some module is installed and supported on a remote server. Equivilant
5955 to foreign_check, but for the remote Webmin system specified by the server
5959 sub remote_foreign_check
5961 return &remote_rpc_call($_[0], { 'action' => 'check',
5966 =head2 remote_foreign_config(server, module)
5968 Gets the configuration for some module from a remote server, as a hash.
5969 Equivalent to foreign_config, but for a remote system.
5972 sub remote_foreign_config
5974 return &remote_rpc_call($_[0], { 'action' => 'config',
5975 'module' => $_[1] });
5978 =head2 remote_eval(server, module, code)
5980 Evaluates some perl code in the context of a module on a remote webmin server.
5981 The server parameter must be the hostname of a remote system, module must
5982 be a module directory name, and code a string of Perl code to run. This can
5983 only be called after remote_foreign_require for the same server and module.
5988 return undef if (&is_readonly_mode());
5989 my $sn = &remote_session_name($_[0]);
5990 return &remote_rpc_call($_[0], { 'action' => 'eval',
5993 'session' => $remote_session{$sn} });
5996 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5998 Transfers some local file to another server via Webmin's RPC protocol, and
5999 returns the resulting remote filename. If the remotefile parameter is given,
6000 that is the destination filename which will be used. Otherwise a randomly
6001 selected temporary filename will be used, and returned by the function.
6006 return undef if (&is_readonly_mode());
6008 my $sn = &remote_session_name($_[0]);
6009 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6010 # Copy data over TCP connection
6011 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
6013 'name' => $_[3] } );
6015 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6016 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
6017 return &$main::remote_error_handler("Failed to transfer file : $error")
6020 while(read(FILE, $got, 1024) > 0) {
6024 shutdown(TWRITE, 1);
6026 if ($error && $error !~ /^OK/) {
6027 # Got back an error!
6028 return &$main::remote_error_handler("Failed to transfer file : $error");
6034 # Just pass file contents as parameters
6036 while(read(FILE, $got, 1024) > 0) {
6040 return &remote_rpc_call($_[0], { 'action' => 'write',
6043 'session' => $remote_session{$sn} });
6047 =head2 remote_read(server, localfile, remotefile)
6049 Transfers a file from a remote server to this system, using Webmin's RPC
6050 protocol. The server parameter must be the hostname of a system registered
6051 in the Webmin Servers Index module, localfile is the destination path on this
6052 system, and remotefile is the file to fetch from the remote server.
6057 my $sn = &remote_session_name($_[0]);
6058 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6059 # Copy data over TCP connection
6060 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
6061 'file' => $_[2] } );
6063 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
6066 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6067 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
6068 return &$main::remote_error_handler("Failed to transfer file : $error")
6071 open(FILE, ">$_[1]");
6072 while(read(TREAD, $got, 1024) > 0) {
6079 # Just get data as return value
6080 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
6082 'session' => $remote_session{$sn} });
6083 open(FILE, ">$_[1]");
6089 =head2 remote_finished
6091 Close all remote sessions. This happens automatically after a while
6092 anyway, but this function should be called to clean things up faster.
6097 foreach my $sn (keys %remote_session) {
6098 my $server = $remote_session_server{$sn};
6099 &remote_rpc_call($server, { 'action' => 'quit',
6100 'session' => $remote_session{$sn} } );
6101 delete($remote_session{$sn});
6102 delete($remote_session_server{$sn});
6104 foreach my $fh (keys %fast_fh_cache) {
6106 delete($fast_fh_cache{$fh});
6110 =head2 remote_error_setup(&function)
6112 Sets a function to be called instead of &error when a remote RPC operation
6113 fails. Useful if you want to have more control over your remote operations.
6116 sub remote_error_setup
6118 $main::remote_error_handler = $_[0] || \&error;
6121 =head2 remote_rpc_call(server, &structure)
6123 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
6124 and then reads back a reply structure. This is mainly for internal use only,
6125 and is called by the other remote_* functions.
6131 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
6133 # Server structure was given
6135 $serv->{'user'} || $serv->{'id'} == 0 ||
6136 return &$main::remote_error_handler(
6137 "No Webmin login set for server");
6140 # lookup the server in the webmin servers module if needed
6141 if (!%main::remote_servers_cache) {
6142 &foreign_require("servers", "servers-lib.pl");
6143 foreach $s (&foreign_call("servers", "list_servers")) {
6144 $main::remote_servers_cache{$s->{'host'}} = $s;
6145 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
6148 $serv = $main::remote_servers_cache{$_[0]};
6149 $serv || return &$main::remote_error_handler(
6150 "No Webmin Servers entry for $_[0]");
6151 $serv->{'user'} || return &$main::remote_error_handler(
6152 "No login set for server $_[0]");
6154 my $ip = $serv->{'ip'} || $serv->{'host'};
6156 # Work out the username and password
6158 if ($serv->{'sameuser'}) {
6159 $user = $remote_user;
6160 defined($main::remote_pass) || return &$main::remote_error_handler(
6161 "Password for this server is not available");
6162 $pass = $main::remote_pass;
6165 $user = $serv->{'user'};
6166 $pass = $serv->{'pass'};
6169 if ($serv->{'fast'} || !$sn) {
6170 # Make TCP connection call to fastrpc.cgi
6171 if (!$fast_fh_cache{$sn} && $sn) {
6172 # Need to open the connection
6173 my $con = &make_http_connection(
6174 $ip, $serv->{'port'}, $serv->{'ssl'},
6175 "POST", "/fastrpc.cgi");
6176 return &$main::remote_error_handler(
6177 "Failed to connect to $serv->{'host'} : $con")
6179 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6180 &write_http_connection($con, "User-agent: Webmin\r\n");
6181 my $auth = &encode_base64("$user:$pass");
6183 &write_http_connection($con, "Authorization: basic $auth\r\n");
6184 &write_http_connection($con, "Content-length: ",
6185 length($tostr),"\r\n");
6186 &write_http_connection($con, "\r\n");
6187 &write_http_connection($con, $tostr);
6189 # read back the response
6190 my $line = &read_http_connection($con);
6191 $line =~ tr/\r\n//d;
6192 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6193 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6195 $line =~ /^HTTP\/1\..\s+200\s+/ ||
6196 return &$main::remote_error_handler("HTTP error : $line");
6198 $line = &read_http_connection($con);
6199 $line =~ tr/\r\n//d;
6201 $line = &read_http_connection($con);
6202 if ($line =~ /^0\s+(.*)/) {
6203 return &$main::remote_error_handler("RPC error : $1");
6205 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
6206 $line =~ /^1\s+(\S+)\s+(\S+)/) {
6207 # Started ok .. connect and save SID
6208 &close_http_connection($con);
6209 my ($port, $sid, $version, $error) = ($1, $2, $3);
6210 &open_socket($ip, $port, $sid, \$error);
6211 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
6213 $fast_fh_cache{$sn} = $sid;
6214 $remote_server_version{$sn} = $version;
6217 while($stuff = &read_http_connection($con)) {
6220 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
6223 elsif (!$fast_fh_cache{$sn}) {
6224 # Open the connection by running fastrpc.cgi locally
6225 pipe(RPCOUTr, RPCOUTw);
6229 open(STDOUT, ">&RPCOUTw");
6233 $ENV{'REQUEST_METHOD'} = 'GET';
6234 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6235 $ENV{'SERVER_ROOT'} ||= $root_directory;
6237 if ($base_remote_user ne 'root' &&
6238 $base_remote_user ne 'admin') {
6239 # Need to fake up a login for the CGI!
6240 &read_acl(undef, \%acl, [ 'root' ]);
6241 $ENV{'BASE_REMOTE_USER'} =
6242 $ENV{'REMOTE_USER'} =
6243 $acl{'root'} ? 'root' : 'admin';
6245 delete($ENV{'FOREIGN_MODULE_NAME'});
6246 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6247 chdir($root_directory);
6248 if (!exec("$root_directory/fastrpc.cgi")) {
6249 print "exec failed : $!\n";
6256 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6260 if ($line =~ /^0\s+(.*)/) {
6261 return &$main::remote_error_handler("RPC error : $2");
6263 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6264 # Started ok .. connect and save SID
6266 my ($port, $sid, $error) = ($1, $2, undef);
6267 &open_socket("localhost", $port, $sid, \$error);
6268 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6269 $fast_fh_cache{$sn} = $sid;
6276 &error("Bad response from fastrpc.cgi : $line");
6279 # Got a connection .. send off the request
6280 my $fh = $fast_fh_cache{$sn};
6281 my $tostr = &serialise_variable($_[1]);
6282 print $fh length($tostr)," $fh\n";
6286 return &$main::remote_error_handler(
6287 "Error reading response length from fastrpc.cgi : $!")
6289 my $rlen = int($rstr);
6290 my ($fromstr, $got);
6291 while(length($fromstr) < $rlen) {
6292 return &$main::remote_error_handler(
6293 "Failed to read from fastrpc.cgi : $!")
6294 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6297 my $from = &unserialise_variable($fromstr);
6299 # No response at all
6300 return &$main::remote_error_handler("Remote Webmin error");
6302 elsif (ref($from) ne 'HASH') {
6304 return &$main::remote_error_handler(
6305 "Invalid remote Webmin response : $from");
6307 elsif (!$from->{'status'}) {
6309 $from->{'rv'} =~ s/\s+at\s+(\S+)\s+line\s+(\d+)(,\s+<\S+>\s+line\s+(\d+))?//;
6310 return &$main::remote_error_handler($from->{'rv'});
6312 if (defined($from->{'arv'})) {
6313 return @{$from->{'arv'}};
6316 return $from->{'rv'};
6320 # Call rpc.cgi on remote server
6321 my $tostr = &serialise_variable($_[1]);
6323 my $con = &make_http_connection($ip, $serv->{'port'},
6324 $serv->{'ssl'}, "POST", "/rpc.cgi");
6325 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6327 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6328 &write_http_connection($con, "User-agent: Webmin\r\n");
6329 my $auth = &encode_base64("$user:$pass");
6331 &write_http_connection($con, "Authorization: basic $auth\r\n");
6332 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6333 &write_http_connection($con, "\r\n");
6334 &write_http_connection($con, $tostr);
6336 # read back the response
6337 my $line = &read_http_connection($con);
6338 $line =~ tr/\r\n//d;
6339 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6340 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6342 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6344 $line = &read_http_connection($con);
6345 $line =~ tr/\r\n//d;
6348 while($line = &read_http_connection($con)) {
6352 my $from = &unserialise_variable($fromstr);
6353 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6354 if (defined($from->{'arv'})) {
6355 return @{$from->{'arv'}};
6358 return $from->{'rv'};
6363 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6365 Executes some function in parallel on multiple servers at once. Fills in
6366 the returns and errors arrays respectively. If the module and library
6367 parameters are given, that module is remotely required on the server first,
6368 to check if it is connectable. The parameters are :
6370 =item servers - A list of Webmin system hash references.
6372 =item parallel - Number of parallel operations to perform.
6374 =item function - Reference to function to call for each system.
6376 =item args - Additional parameters to the function.
6378 =item returns - Array ref to place return values into, in same order as servers.
6380 =item errors - Array ref to place error messages into.
6382 =item module - Optional module to require on the remote system first.
6384 =item library - Optional library to require in the module.
6387 sub remote_multi_callback
6389 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6390 &remote_error_setup(\&remote_multi_callback_error);
6392 # Call the functions
6394 foreach my $g (@$servs) {
6400 $remote_multi_callback_err = undef;
6402 # Require the remote lib
6403 &remote_foreign_require($g->{'host'}, $mod, $lib);
6404 if ($remote_multi_callback_err) {
6405 # Failed .. return error
6406 print $wh &serialise_variable(
6407 [ undef, $remote_multi_callback_err ]);
6413 my $a = ref($args) ? $args->[$p] : $args;
6414 my $rv = &$func($g, $a);
6417 print $wh &serialise_variable(
6418 [ $rv, $remote_multi_callback_err ]);
6426 # Read back the results
6428 foreach my $g (@$servs) {
6432 $errs->[$p] = "Failed to read response from $g->{'host'}";
6435 my $rv = &unserialise_variable($line);
6437 $rets->[$p] = $rv->[0];
6438 $errs->[$p] = $rv->[1];
6443 &remote_error_setup(undef);
6446 sub remote_multi_callback_error
6448 $remote_multi_callback_err = $_[0];
6451 =head2 serialise_variable(variable)
6453 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6454 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6455 called on each member to serialize the entire object.
6458 sub serialise_variable
6460 if (!defined($_[0])) {
6466 $rv = &urlize($_[0]);
6468 elsif ($r eq 'SCALAR') {
6469 $rv = &urlize(${$_[0]});
6471 elsif ($r eq 'ARRAY') {
6472 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6474 elsif ($r eq 'HASH') {
6475 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6476 &urlize(&serialise_variable($_[0]->{$_})) }
6479 elsif ($r eq 'REF') {
6480 $rv = &serialise_variable(${$_[0]});
6482 elsif ($r eq 'CODE') {
6487 # An object - treat as a hash
6488 $r = "OBJECT ".&urlize($r);
6489 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6490 &urlize(&serialise_variable($_[0]->{$_})) }
6493 return ($r ? $r : 'VAL').",".$rv;
6496 =head2 unserialise_variable(string)
6498 Converts a string created by serialise_variable() back into the original
6499 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6500 object, the same class is used on this system, if available.
6503 sub unserialise_variable
6505 my @v = split(/,/, $_[0]);
6507 if ($v[0] eq 'VAL') {
6508 @v = split(/,/, $_[0], -1);
6509 $rv = &un_urlize($v[1]);
6511 elsif ($v[0] eq 'SCALAR') {
6512 local $r = &un_urlize($v[1]);
6515 elsif ($v[0] eq 'ARRAY') {
6517 for(my $i=1; $i<@v; $i++) {
6518 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6521 elsif ($v[0] eq 'HASH') {
6523 for(my $i=1; $i<@v; $i+=2) {
6524 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6525 &unserialise_variable(&un_urlize($v[$i+1]));
6528 elsif ($v[0] eq 'REF') {
6529 local $r = &unserialise_variable($v[1]);
6532 elsif ($v[0] eq 'UNDEF') {
6535 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6536 # An object hash that we have to re-bless
6539 for(my $i=1; $i<@v; $i+=2) {
6540 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6541 &unserialise_variable(&un_urlize($v[$i+1]));
6549 =head2 other_groups(user)
6551 Returns a list of secondary groups a user is a member of, as a list of
6560 while(my @g = getgrent()) {
6561 my @m = split(/\s+/, $g[3]);
6562 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6564 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6568 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6570 Returns HTML for a button that pops up a data chooser window. The parameters
6573 =item dayfield - Name of the text field to place the day of the month into.
6575 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6577 =item yearfield - Name of the text field to place the year into.
6580 sub date_chooser_button
6582 return &theme_date_chooser_button(@_)
6583 if (defined(&theme_date_chooser_button));
6584 my ($w, $h) = (250, 225);
6585 if ($gconfig{'db_sizedate'}) {
6586 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6588 return "<input type=button onClick='window.dfield = form.$_[0]; window.mfield = form.$_[1]; window.yfield = form.$_[2]; window.open(\"$gconfig{'webprefix'}/date_chooser.cgi?day=\"+escape(dfield.value)+\"&month=\"+escape(mfield.selectedIndex)+\"&year=\"+yfield.value, \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,width=$w,height=$h\")' value=\"...\">\n";
6591 =head2 help_file(module, file)
6593 Returns the path to a module's help file of some name, typically under the
6594 help directory with a .html extension.
6599 my $mdir = &module_root_directory($_[0]);
6600 my $dir = "$mdir/help";
6601 foreach my $o (@lang_order_list) {
6602 my $lang = "$dir/$_[1].$o.html";
6603 return $lang if (-r $lang);
6605 return "$dir/$_[1].html";
6610 Seeds the random number generator, if not already done in this script. On Linux
6611 this makes use of the current time, process ID and a read from /dev/urandom.
6612 On other systems, only the current time and process ID are used.
6617 if (!$main::done_seed_random) {
6618 if (open(RANDOM, "/dev/urandom")) {
6620 read(RANDOM, $buf, 4);
6622 srand(time() ^ $$ ^ $buf);
6627 $main::done_seed_random = 1;
6631 =head2 disk_usage_kb(directory)
6633 Returns the number of kB used by some directory and all subdirs. Implemented
6634 by calling the C<du -k> command.
6639 my $dir = &translate_filename($_[0]);
6641 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6643 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6645 return $out =~ /^([0-9]+)/ ? $1 : "???";
6648 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6650 Returns the number of bytes taken up by all files in some directory and all
6651 sub-directories, by summing up their lengths. The disk_usage_kb is more
6652 reflective of reality, as the filesystem typically pads file sizes to 1k or
6656 sub recursive_disk_usage
6658 my $dir = &translate_filename($_[0]);
6665 my @st = stat($dir);
6671 my @files = readdir(DIR);
6673 foreach my $f (@files) {
6674 next if ($f eq "." || $f eq "..");
6675 next if ($skip && $f =~ /$skip/);
6676 next if ($only && $f !~ /$only/);
6677 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6683 =head2 help_search_link(term, [ section, ... ] )
6685 Returns HTML for a link to the man module for searching local and online
6686 docs for various search terms. The term parameter can either be a single
6687 word like 'bind', or a space-separated list of words. This function is typically
6688 used by modules that want to refer users to additional documentation in man
6689 pages or local system doc files.
6692 sub help_search_link
6694 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6695 my $for = &urlize(shift(@_));
6696 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6697 join("&", map { "section=$_" } @_)."&".
6698 "for=$for&exact=1&check=".&get_module_name()."'>".
6699 $text{'helpsearch'}."</a>\n";
6706 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6708 Opens a connection to some HTTP server, maybe through a proxy, and returns
6709 a handle object. The handle can then be used to send additional headers
6710 and read back a response. If anything goes wrong, returns an error string.
6711 The parameters are :
6713 =item host - Hostname or IP address of the webserver to connect to.
6715 =item port - HTTP port number to connect to.
6717 =item ssl - Set to 1 to connect in SSL mode.
6719 =item method - HTTP method, like GET or POST.
6721 =item page - Page to request on the webserver, like /foo/index.html
6723 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6726 sub make_http_connection
6728 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6731 foreach my $h (@$headers) {
6732 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6736 if (&is_readonly_mode()) {
6737 return "HTTP connections not allowed in readonly mode";
6739 my $rv = { 'fh' => time().$$ };
6742 eval "use Net::SSLeay";
6743 $@ && return $text{'link_essl'};
6744 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6745 eval "Net::SSLeay::load_error_strings()";
6746 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6747 return "Failed to create SSL context";
6748 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6749 return "Failed to create SSL connection";
6751 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6752 !&no_proxy($host)) {
6755 &open_socket($1, $2, $rv->{'fh'}, \$error);
6758 my $fh = $rv->{'fh'};
6759 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6760 if ($gconfig{'proxy_user'}) {
6761 my $auth = &encode_base64(
6762 "$gconfig{'proxy_user'}:".
6763 "$gconfig{'proxy_pass'}");
6764 $auth =~ tr/\r\n//d;
6765 print $fh "Proxy-Authorization: Basic $auth\r\n";
6769 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6770 return "Proxy error : $3" if ($2 != 200);
6773 return "Proxy error : $line";
6778 elsif (!$gconfig{'proxy_fallback'}) {
6779 # Connection to proxy failed - give up
6786 &open_socket($host, $port, $rv->{'fh'}, \$error);
6787 return $error if ($error);
6789 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6790 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6791 return "SSL connect() failed";
6792 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6793 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6796 # Plain HTTP request
6798 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6799 !&no_proxy($host)) {
6802 &open_socket($1, $2, $rv->{'fh'}, \$error);
6806 my $fh = $rv->{'fh'};
6807 my $rtxt = $method." ".
6808 "http://$host:$port$page HTTP/1.0\r\n";
6809 if ($gconfig{'proxy_user'}) {
6810 my $auth = &encode_base64(
6811 "$gconfig{'proxy_user'}:".
6812 "$gconfig{'proxy_pass'}");
6813 $auth =~ tr/\r\n//d;
6814 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6819 elsif (!$gconfig{'proxy_fallback'}) {
6824 # Connecting directly
6826 &open_socket($host, $port, $rv->{'fh'}, \$error);
6827 return $error if ($error);
6828 my $fh = $rv->{'fh'};
6829 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6836 =head2 read_http_connection(&handle, [bytes])
6838 Reads either one line or up to the specified number of bytes from the handle,
6839 originally supplied by make_http_connection.
6842 sub read_http_connection
6846 if ($h->{'ssl_con'}) {
6849 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6850 # need to read more..
6851 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6853 $rv = $h->{'buffer'};
6854 delete($h->{'buffer'});
6857 $h->{'buffer'} .= $more;
6859 $rv = substr($h->{'buffer'}, 0, $idx+1);
6860 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6863 if (length($h->{'buffer'})) {
6864 $rv = $h->{'buffer'};
6865 delete($h->{'buffer'});
6868 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6874 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6877 my $fh = $h->{'fh'};
6881 $rv = undef if ($rv eq "");
6885 =head2 write_http_connection(&handle, [data+])
6887 Writes the given data to the given HTTP connection handle.
6890 sub write_http_connection
6893 my $fh = $h->{'fh'};
6895 if ($h->{'ssl_ctx'}) {
6896 foreach my $s (@_) {
6897 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6898 $allok = 0 if (!$ok);
6902 my $ok = (print $fh @_);
6903 $allok = 0 if (!$ok);
6908 =head2 close_http_connection(&handle)
6910 Closes a connection to an HTTP server, identified by the given handle.
6913 sub close_http_connection
6919 =head2 clean_environment
6921 Deletes any environment variables inherited from miniserv so that they
6922 won't be passed to programs started by webmin. This is useful when calling
6923 programs that check for CGI-related environment variables and modify their
6924 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6927 sub clean_environment
6929 %UNCLEAN_ENV = %ENV;
6930 foreach my $k (keys %ENV) {
6931 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6935 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6936 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6937 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6938 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6939 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6940 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6941 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6942 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6948 =head2 reset_environment
6950 Puts the environment back how it was before clean_environment was callled.
6953 sub reset_environment
6956 foreach my $k (keys %UNCLEAN_ENV) {
6957 $ENV{$k} = $UNCLEAN_ENV{$k};
6959 undef(%UNCLEAN_ENV);
6963 =head2 progress_callback
6965 Never called directly, but useful for passing to &http_download to print
6966 out progress of an HTTP request.
6969 sub progress_callback
6971 if (defined(&theme_progress_callback)) {
6972 # Call the theme override
6973 return &theme_progress_callback(@_);
6977 print $progress_callback_prefix;
6979 $progress_size = $_[1];
6980 $progress_step = int($_[1] / 10);
6981 print &text('progress_size2', $progress_callback_url,
6982 &nice_size($progress_size)),"<br>\n";
6985 $progress_size = undef;
6986 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6988 $last_progress_time = $last_progress_size = undef;
6990 elsif ($_[0] == 3) {
6992 my $sp = $progress_callback_prefix.(" " x 5);
6993 if ($progress_size) {
6994 # And we have a size to compare against
6995 my $st = int(($_[1] * 10) / $progress_size);
6996 my $time_now = time();
6997 if ($st != $progress_step ||
6998 $time_now - $last_progress_time > 60) {
6999 # Show progress every 10% or 60 seconds
7000 print $sp,&text('progress_datan', &nice_size($_[1]),
7001 int($_[1]*100/$progress_size)),"<br>\n";
7002 $last_progress_time = $time_now;
7004 $progress_step = $st;
7007 # No total size .. so only show in 100k jumps
7008 if ($_[1] > $last_progress_size+100*1024) {
7009 print $sp,&text('progress_data2n',
7010 &nice_size($_[1])),"<br>\n";
7011 $last_progress_size = $_[1];
7015 elsif ($_[0] == 4) {
7016 # All done downloading
7017 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
7019 elsif ($_[0] == 5) {
7020 # Got new location after redirect
7021 $progress_callback_url = $_[1];
7023 elsif ($_[0] == 6) {
7025 $progress_callback_url = $_[1];
7026 print &text('progress_incache', $progress_callback_url),"<br>\n";
7030 =head2 switch_to_remote_user
7032 Changes the user and group of the current process to that of the unix user
7033 with the same name as the current webmin login, or fails if there is none.
7034 This should be called by Usermin module scripts that only need to run with
7035 limited permissions.
7038 sub switch_to_remote_user
7040 @remote_user_info = $remote_user ? getpwnam($remote_user) :
7042 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
7043 &create_missing_homedir(\@remote_user_info);
7045 &switch_to_unix_user(\@remote_user_info);
7046 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
7047 $ENV{'HOME'} = $remote_user_info[7];
7049 # Export global variables to caller
7050 if ($main::export_to_caller) {
7051 my ($callpkg) = caller();
7052 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
7056 =head2 switch_to_unix_user(&user-details)
7058 Switches the current process to the UID and group ID from the given list
7059 of user details, which must be in the format returned by getpwnam.
7062 sub switch_to_unix_user
7065 if (!defined($uinfo->[0])) {
7066 # No username given, so just use given GID
7067 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
7070 # Use all groups from user
7071 ($(, $)) = ( $uinfo->[3],
7072 "$uinfo->[3] ".join(" ", $uinfo->[3],
7073 &other_groups($uinfo->[0])) );
7076 POSIX::setuid($uinfo->[2]);
7078 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
7079 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
7083 =head2 eval_as_unix_user(username, &code)
7085 Runs some code fragment with the effective UID and GID switch to that
7086 of the given Unix user, so that file IO takes place with his permissions.
7090 sub eval_as_unix_user
7092 my ($user, $code) = @_;
7093 my @uinfo = getpwnam($user);
7094 if (!scalar(@uinfo)) {
7095 &error("eval_as_unix_user called with invalid user $user");
7097 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
7101 local $main::error_must_die = 1;
7108 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
7111 return wantarray ? @rv : $rv[0];
7114 =head2 create_user_config_dirs
7116 Creates per-user config directories and sets $user_config_directory and
7117 $user_module_config_directory to them. Also reads per-user module configs
7118 into %userconfig. This should be called by Usermin module scripts that need
7119 to store per-user preferences or other settings.
7122 sub create_user_config_dirs
7124 return if (!$gconfig{'userconfig'});
7125 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
7126 return if (!@uinfo || !$uinfo[7]);
7127 &create_missing_homedir(\@uinfo);
7128 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
7129 if (!-d $user_config_directory) {
7130 mkdir($user_config_directory, 0700) ||
7131 &error("Failed to create $user_config_directory : $!");
7132 if ($< == 0 && $uinfo[2]) {
7133 chown($uinfo[2], $uinfo[3], $user_config_directory);
7136 if (&get_module_name()) {
7137 $user_module_config_directory = $user_config_directory."/".
7139 if (!-d $user_module_config_directory) {
7140 mkdir($user_module_config_directory, 0700) ||
7141 &error("Failed to create $user_module_config_directory : $!");
7142 if ($< == 0 && $uinfo[2]) {
7143 chown($uinfo[2], $uinfo[3], $user_config_directory);
7147 &read_file_cached("$module_root_directory/defaultuconfig",
7149 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
7150 &read_file_cached("$user_module_config_directory/config",
7154 # Export global variables to caller
7155 if ($main::export_to_caller) {
7156 my ($callpkg) = caller();
7157 foreach my $v ('$user_config_directory',
7158 '$user_module_config_directory', '%userconfig') {
7159 my ($vt, $vn) = split('', $v, 2);
7160 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
7165 =head2 create_missing_homedir(&uinfo)
7167 If auto homedir creation is enabled, create one for this user if needed.
7168 For internal use only.
7171 sub create_missing_homedir
7174 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
7175 # Use has no home dir .. make one
7176 system("mkdir -p ".quotemeta($uinfo->[7]));
7177 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
7178 if ($gconfig{'create_homedir_perms'} ne '') {
7179 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
7184 =head2 filter_javascript(text)
7186 Disables all javascript <script>, onClick= and so on tags in the given HTML,
7187 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
7190 sub filter_javascript
7193 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
7194 $rv =~ s/(on(Abort|Blur|Change|Click|DblClick|DragDrop|Error|Focus|KeyDown|KeyPress|KeyUp|Load|MouseDown|MouseMove|MouseOut|MouseOver|MouseUp|Move|Reset|Resize|Select|Submit|Unload)=)/x$1/gi;
7195 $rv =~ s/(javascript:)/x$1/gi;
7196 $rv =~ s/(vbscript:)/x$1/gi;
7200 =head2 resolve_links(path)
7202 Given a path that may contain symbolic links, returns the real path.
7208 $path =~ s/\/+/\//g;
7209 $path =~ s/\/$// if ($path ne "/");
7210 my @p = split(/\/+/, $path);
7212 for(my $i=0; $i<@p; $i++) {
7213 my $sofar = "/".join("/", @p[0..$i]);
7214 my $lnk = readlink($sofar);
7215 if ($lnk eq $sofar) {
7216 # Link to itself! Cannot do anything more really ..
7219 elsif ($lnk =~ /^\//) {
7220 # Link is absolute..
7221 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
7225 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
7231 =head2 simplify_path(path, bogus)
7233 Given a path, maybe containing elements ".." and "." , convert it to a
7234 clean, absolute form. Returns undef if this is not possible.
7242 my @bits = split(/\/+/, $dir);
7245 foreach my $b (@bits) {
7249 elsif ($b eq "..") {
7251 if (scalar(@fixedbits) == 0) {
7252 # Cannot! Already at root!
7259 push(@fixedbits, $b);
7262 return "/".join('/', @fixedbits);
7265 =head2 same_file(file1, file2)
7267 Returns 1 if two files are actually the same
7272 return 1 if ($_[0] eq $_[1]);
7273 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7274 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7275 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7276 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7277 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7278 return 0 if (!@stat1 || !@stat2);
7279 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7282 =head2 flush_webmin_caches
7284 Clears all in-memory and on-disk caches used by Webmin.
7287 sub flush_webmin_caches
7289 undef(%main::read_file_cache);
7290 undef(%main::acl_hash_cache);
7291 undef(%main::acl_array_cache);
7292 undef(%main::has_command_cache);
7293 undef(@main::list_languages_cache);
7294 undef($main::got_list_usermods_cache);
7295 undef(@main::list_usermods_cache);
7296 undef(%main::foreign_installed_cache);
7297 unlink("$config_directory/module.infos.cache");
7298 &get_all_module_infos();
7301 =head2 list_usermods
7303 Returns a list of additional module restrictions. For internal use in
7309 if (!$main::got_list_usermods_cache) {
7310 @main::list_usermods_cache = ( );
7312 open(USERMODS, "$config_directory/usermin.mods");
7314 if (/^([^:]+):(\+|-|):(.*)/) {
7315 push(@main::list_usermods_cache,
7316 [ $1, $2, [ split(/\s+/, $3) ] ]);
7320 $main::got_list_usermods_cache = 1;
7322 return @main::list_usermods_cache;
7325 =head2 available_usermods(&allmods, &usermods)
7327 Returns a list of modules that are available to the given user, based
7328 on usermod additional/subtractions. For internal use by Usermin only.
7331 sub available_usermods
7333 return @{$_[0]} if (!@{$_[1]});
7335 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7336 my @uinfo = @remote_user_info;
7337 @uinfo = getpwnam($remote_user) if (!@uinfo);
7338 foreach my $u (@{$_[1]}) {
7340 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7343 elsif ($u->[0] =~ /^\@(.*)$/) {
7344 # Check for group membership
7345 my @ginfo = getgrnam($1);
7346 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7347 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7349 elsif ($u->[0] =~ /^\//) {
7350 # Check users and groups in file
7352 open(USERFILE, $u->[0]);
7355 if ($_ eq $remote_user) {
7358 elsif (/^\@(.*)$/) {
7359 my @ginfo = getgrnam($1);
7361 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7362 &indexof($remote_user,
7363 split(/\s+/, $ginfo[3])) >= 0));
7370 if ($u->[1] eq "+") {
7371 map { $mods{$_}++ } @{$u->[2]};
7373 elsif ($u->[1] eq "-") {
7374 map { delete($mods{$_}) } @{$u->[2]};
7378 map { $mods{$_}++ } @{$u->[2]};
7382 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7385 =head2 get_available_module_infos(nocache)
7387 Returns a list of modules available to the current user, based on
7388 operating system support, access control and usermod restrictions. Useful
7389 in themes that need to display a list of modules the user can use.
7390 Each element of the returned array is a hash reference in the same format as
7391 returned by get_module_info.
7394 sub get_available_module_infos
7397 &read_acl(\%acl, \%uacl, [ $base_remote_user ]);
7398 my $risk = $gconfig{'risk_'.$base_remote_user};
7400 foreach my $minfo (&get_all_module_infos($_[0])) {
7401 next if (!&check_os_support($minfo));
7403 # Check module risk level
7404 next if ($risk ne 'high' && $minfo->{'risk'} &&
7405 $minfo->{'risk'} !~ /$risk/);
7409 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7410 !$acl{$base_remote_user,"*"});
7412 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7416 # Check usermod restrictions
7417 my @usermods = &list_usermods();
7418 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7419 &available_usermods(\@rv, \@usermods);
7421 # Check RBAC restrictions
7423 foreach my $m (@rv) {
7424 if (&supports_rbac($m->{'dir'}) &&
7425 &use_rbac_module_acl(undef, $m->{'dir'})) {
7426 local $rbacs = &get_rbac_module_acl($remote_user,
7434 # Module or system doesn't support RBAC
7435 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7441 if (defined(&theme_foreign_available)) {
7442 foreach my $m (@rbacrv) {
7443 if (&theme_foreign_available($m->{'dir'})) {
7452 # Check licence module vetos
7454 if ($main::licence_module) {
7455 foreach my $m (@themerv) {
7456 if (&foreign_call($main::licence_module,
7457 "check_module_licence", $m->{'dir'})) {
7469 =head2 get_visible_module_infos(nocache)
7471 Like get_available_module_infos, but excludes hidden modules from the list.
7472 Each element of the returned array is a hash reference in the same format as
7473 returned by get_module_info.
7476 sub get_visible_module_infos
7479 my $pn = &get_product_name();
7480 return grep { !$_->{'hidden'} &&
7481 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7484 =head2 get_visible_modules_categories(nocache)
7486 Returns a list of Webmin module categories, each of which is a hash ref
7487 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7488 of modules in the category, in the format returned by get_module_info.
7489 Un-used modules are automatically assigned to the 'unused' category, and
7490 those with no category are put into 'others'.
7493 sub get_visible_modules_categories
7496 my @mods = &get_visible_module_infos($nocache);
7498 if (&get_product_name() eq 'webmin') {
7499 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7500 @mods = grep { $_->{'installed'} ne '0' } @mods;
7502 my %cats = &list_categories(\@mods);
7504 foreach my $c (keys %cats) {
7505 my $cat = { 'code' => $c || 'other',
7506 'desc' => $cats{$c} };
7507 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7510 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7511 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7513 # Add un-installed modules in magic category
7514 my $cat = { 'code' => 'unused',
7515 'desc' => $text{'main_unused'},
7517 'modules' => \@unmods };
7523 =head2 is_under_directory(directory, file)
7525 Returns 1 if the given file is under the specified directory, 0 if not.
7526 Symlinks are taken into account in the file to find it's 'real' location.
7529 sub is_under_directory
7531 my ($dir, $file) = @_;
7532 return 1 if ($dir eq "/");
7533 return 0 if ($file =~ /\.\./);
7534 my $ld = &resolve_links($dir);
7536 return &is_under_directory($ld, $file);
7538 my $lp = &resolve_links($file);
7540 return &is_under_directory($dir, $lp);
7542 return 0 if (length($file) < length($dir));
7543 return 1 if ($dir eq $file);
7545 return substr($file, 0, length($dir)) eq $dir;
7548 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7550 Given an absolute URL, returns the host, port, page and ssl flag components.
7551 If a username and password are given before the hostname, return those too.
7552 Relative URLs can also be parsed, if the base information is provided.
7557 if ($_[0] =~ /^(http|https):\/\/([^\@]+\@)?\[([^\]]+)\](:(\d+))?(\/\S*)?$/ ||
7558 $_[0] =~ /^(http|https):\/\/([^\@]+\@)?([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7560 my $ssl = $1 eq 'https';
7561 my @rv = ($3, $4 ? $5 : $ssl ? 443 : 80, $6 || "/", $ssl);
7562 if ($2 =~ /^([^:]+):(\S+)\@/) {
7571 elsif ($_[0] =~ /^\/\S*$/) {
7572 # A relative to the server URL
7573 return ($_[1], $_[2], $_[0], $_[4], $_[5], $_[6]);
7576 # A relative to the directory URL
7578 $page =~ s/[^\/]+$//;
7579 return ($_[1], $_[2], $page.$_[0], $_[4], $_[5], $_[6]);
7583 =head2 check_clicks_function
7585 Returns HTML for a JavaScript function called check_clicks that returns
7586 true when first called, but false subsequently. Useful on onClick for
7587 critical buttons. Deprecated, as this method of preventing duplicate actions
7591 sub check_clicks_function
7596 function check_clicks(form)
7603 for(i=0; i<form.length; i++)
7604 form.elements[i].disabled = true;
7613 =head2 load_entities_map
7615 Returns a hash ref containing mappings between HTML entities (like ouml) and
7616 ascii values (like 246). Mainly for internal use.
7619 sub load_entities_map
7621 if (!%entities_map_cache) {
7623 open(EMAP, "$root_directory/entities_map.txt");
7625 if (/^(\d+)\s+(\S+)/) {
7626 $entities_map_cache{$2} = $1;
7631 return \%entities_map_cache;
7634 =head2 entities_to_ascii(string)
7636 Given a string containing HTML entities like ö and 7, replace them
7637 with their ASCII equivalents.
7640 sub entities_to_ascii
7643 my $emap = &load_entities_map();
7644 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7645 $str =~ s/&#(\d+);/chr($1)/ge;
7649 =head2 get_product_name
7651 Returns either 'webmin' or 'usermin', depending on which program the current
7652 module is in. Useful for modules that can be installed into either.
7655 sub get_product_name
7657 return $gconfig{'product'} if (defined($gconfig{'product'}));
7658 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7663 Returns the character set for the current language, such as iso-8859-1.
7668 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7669 $current_lang_info->{'charset'} ?
7670 $current_lang_info->{'charset'} : $default_charset;
7674 =head2 get_display_hostname
7676 Returns the system's hostname for UI display purposes. This may be different
7677 from the actual hostname if you administrator has configured it so in the
7678 Webmin Configuration module.
7681 sub get_display_hostname
7683 if ($gconfig{'hostnamemode'} == 0) {
7684 return &get_system_hostname();
7686 elsif ($gconfig{'hostnamemode'} == 3) {
7687 return $gconfig{'hostnamedisplay'};
7690 my $h = $ENV{'HTTP_HOST'};
7692 if ($gconfig{'hostnamemode'} == 2) {
7693 $h =~ s/^(www|ftp|mail)\.//i;
7699 =head2 save_module_config([&config], [modulename])
7701 Saves the configuration for some module. The config parameter is an optional
7702 hash reference of names and values to save, which defaults to the global
7703 %config hash. The modulename parameter is the module to update the config
7704 file, which defaults to the current module.
7707 sub save_module_config
7709 my $c = $_[0] || { &get_module_variable('%config') };
7710 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7711 &write_file("$config_directory/$m/config", $c);
7714 =head2 save_user_module_config([&config], [modulename])
7716 Saves the user's Usermin preferences for some module. The config parameter is
7717 an optional hash reference of names and values to save, which defaults to the
7718 global %userconfig hash. The modulename parameter is the module to update the
7719 config file, which defaults to the current module.
7722 sub save_user_module_config
7724 my $c = $_[0] || { &get_module_variable('%userconfig') };
7725 my $m = $_[1] || &get_module_name();
7726 my $ucd = $user_config_directory;
7728 my @uinfo = @remote_user_info ? @remote_user_info
7729 : getpwnam($remote_user);
7730 return if (!@uinfo || !$uinfo[7]);
7731 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7733 &write_file("$ucd/$m/config", $c);
7736 =head2 nice_size(bytes, [min])
7738 Converts a number of bytes into a number followed by a suffix like GB, MB
7739 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7740 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7745 my ($units, $uname);
7746 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7747 $units = 1024*1024*1024*1024;
7750 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7751 $units = 1024*1024*1024;
7754 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7758 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7766 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7768 return $sz." ".$uname;
7771 =head2 get_perl_path
7773 Returns the path to Perl currently in use, such as /usr/bin/perl.
7778 if (open(PERL, "$config_directory/perl-path")) {
7784 return $^X if (-x $^X);
7785 return &has_command("perl");
7788 =head2 get_goto_module([&mods])
7790 Returns the details of a module that the current user should be re-directed
7791 to after logging in, or undef if none. Useful for themes.
7796 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7797 if ($gconfig{'gotomodule'}) {
7798 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7799 return $goto if ($goto);
7801 if (@mods == 1 && $gconfig{'gotoone'}) {
7807 =head2 select_all_link(field, form, [text])
7809 Returns HTML for a 'Select all' link that uses Javascript to select
7810 multiple checkboxes with the same name. The parameters are :
7812 =item field - Name of the checkbox inputs.
7814 =item form - Index of the form on the page.
7816 =item text - Message for the link, defaulting to 'Select all'.
7821 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7822 my ($field, $form, $text) = @_;
7824 $text ||= $text{'ui_selall'};
7825 return "<a class='select_all' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = true; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = true; } } return false'>$text</a>";
7828 =head2 select_invert_link(field, form, text)
7830 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7831 selection on multiple checkboxes with the same name. The parameters are :
7833 =item field - Name of the checkbox inputs.
7835 =item form - Index of the form on the page.
7837 =item text - Message for the link, defaulting to 'Invert selection'.
7840 sub select_invert_link
7842 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7843 my ($field, $form, $text) = @_;
7845 $text ||= $text{'ui_selinv'};
7846 return "<a class='select_invert' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = !ff.checked; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = !ff[i].checked; } } return false'>$text</a>";
7849 =head2 select_rows_link(field, form, text, &rows)
7851 Returns HTML for a link that uses Javascript to select rows with particular
7852 values for their checkboxes. The parameters are :
7854 =item field - Name of the checkbox inputs.
7856 =item form - Index of the form on the page.
7858 =item text - Message for the link, de
7860 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7863 sub select_rows_link
7865 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7866 my ($field, $form, $text, $rows) = @_;
7868 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7869 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7870 $js .= "return false;";
7871 return "<a href='#' onClick='$js'>$text</a>";
7874 =head2 check_pid_file(file)
7876 Given a pid file, returns the PID it contains if the process is running.
7881 open(PIDFILE, $_[0]) || return undef;
7882 my $pid = <PIDFILE>;
7884 $pid =~ /^\s*(\d+)/ || return undef;
7885 kill(0, $1) || return undef;
7891 Return the local os-specific library name to this module. For internal use only.
7896 my $mn = &get_module_name();
7897 my $md = &module_root_directory($mn);
7898 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7899 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7901 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7902 return "$mn-$gconfig{'os_type'}-lib.pl";
7904 elsif (-r "$md/$mn-generic-lib.pl") {
7905 return "$mn-generic-lib.pl";
7912 =head2 module_root_directory(module)
7914 Given a module name, returns its root directory. On a typical Webmin install,
7915 all modules are under the same directory - but it is theoretically possible to
7919 sub module_root_directory
7921 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7922 if (@root_directories > 1) {
7923 foreach my $r (@root_directories) {
7929 return "$root_directories[0]/$d";
7932 =head2 list_mime_types
7934 Returns a list of all known MIME types and their extensions, as a list of hash
7935 references with keys :
7937 =item type - The MIME type, like text/plain.
7939 =item exts - A list of extensions, like .doc and .avi.
7941 =item desc - A human-readable description for the MIME type.
7946 if (!@list_mime_types_cache) {
7948 open(MIME, "$root_directory/mime.types");
7952 if (s/#\s*(.*)$//g) {
7955 my ($type, @exts) = split(/\s+/);
7957 push(@list_mime_types_cache, { 'type' => $type,
7964 return @list_mime_types_cache;
7967 =head2 guess_mime_type(filename, [default])
7969 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7970 The optional default parameter sets a default type of use if none is found,
7971 which defaults to application/octet-stream.
7976 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7978 foreach my $t (&list_mime_types()) {
7979 foreach my $e (@{$t->{'exts'}}) {
7980 return $t->{'type'} if (lc($e) eq lc($ext));
7984 return @_ > 1 ? $_[1] : "application/octet-stream";
7987 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7989 Opens a file handle for writing to a temporary file, which will only be
7990 renamed over the real file when the handle is closed. This allows critical
7991 files like /etc/shadow to be updated safely, even if writing fails part way
7992 through due to lack of disk space. The parameters are :
7994 =item handle - File handle to open, as you would use in Perl's open function.
7996 =item file - Full path to the file to write, prefixed by > or >> to indicate over-writing or appending. In append mode, no temp file is used.
7998 =item no-error - By default, this function will call error if the open fails. Setting this parameter to 1 causes it to return 0 on failure, and set $! with the error code.
8000 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
8002 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
8008 # Just getting a temp file
8009 if (!defined($main::open_tempfiles{$_[0]})) {
8010 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
8011 my $dir = $1 || "/";
8012 my $tmp = "$dir/$2.webmintmp.$$";
8013 $main::open_tempfiles{$_[0]} = $tmp;
8014 push(@main::temporary_files, $tmp);
8016 return $main::open_tempfiles{$_[0]};
8020 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8021 $fh = &callers_package($fh);
8023 my %gaccess = &get_module_acl(undef, "");
8024 my $db = $gconfig{'debug_what_write'};
8025 if ($file =~ /\r|\n|\0/) {
8026 if ($noerror) { return 0; }
8027 else { &error("Filename contains invalid characters"); }
8029 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
8030 # Read-only mode .. veto all writes
8031 print STDERR "vetoing write to $file\n";
8032 return open($fh, ">$null_file");
8034 elsif ($file =~ /^(>|>>|)nul$/i) {
8035 # Write to Windows null device
8036 &webmin_debug_log($1 eq ">" ? "WRITE" :
8037 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
8039 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
8040 # Writes to /dev/null or TTYs don't need to be handled
8041 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
8042 return open($fh, $file);
8044 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
8045 &webmin_debug_log("WRITE", $1) if ($db);
8046 # Over-writing a file, via a temp file
8048 $file = &translate_filename($file);
8050 # Open the link target instead
8051 $file = &resolve_links($file);
8054 # Cannot open a directory!
8055 if ($noerror) { return 0; }
8056 else { &error("Cannot write to directory $file"); }
8058 my $tmp = &open_tempfile($file);
8059 my $ex = open($fh, ">$tmp");
8060 if (!$ex && $! =~ /permission/i) {
8061 # Could not open temp file .. try opening actual file
8063 $ex = open($fh, ">$file");
8064 delete($main::open_tempfiles{$file});
8067 $main::open_temphandles{$fh} = $file;
8070 if (!$ex && !$noerror) {
8071 &error(&text("efileopen", $file, $!));
8075 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
8076 # Just writing direct to a file
8077 &webmin_debug_log("WRITE", $1) if ($db);
8079 $file = &translate_filename($file);
8080 my @old_attributes = &get_clear_file_attributes($file);
8081 my $ex = open($fh, ">$file");
8082 &reset_file_attributes($file, \@old_attributes);
8083 $main::open_temphandles{$fh} = $file;
8084 if (!$ex && !$noerror) {
8085 &error(&text("efileopen", $file, $!));
8090 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
8091 # Appending to a file .. nothing special to do
8092 &webmin_debug_log("APPEND", $1) if ($db);
8094 $file = &translate_filename($file);
8095 my @old_attributes = &get_clear_file_attributes($file);
8096 my $ex = open($fh, ">>$file");
8097 &reset_file_attributes($file, \@old_attributes);
8098 $main::open_temphandles{$fh} = $file;
8099 if (!$ex && !$noerror) {
8100 &error(&text("efileopen", $file, $!));
8105 elsif ($file =~ /^([a-zA-Z]:)?\//) {
8106 # Read mode .. nothing to do here
8107 &webmin_debug_log("READ", $file) if ($db);
8108 $file = &translate_filename($file);
8109 return open($fh, $file);
8111 elsif ($file eq ">" || $file eq ">>") {
8112 my ($package, $filename, $line) = caller;
8113 if ($noerror) { return 0; }
8114 else { &error("Missing file to open at ${package}::${filename} line $line"); }
8117 my ($package, $filename, $line) = caller;
8118 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
8123 =head2 close_tempfile(file|handle)
8125 Copies a temp file to the actual file, assuming that all writes were
8126 successful. The handle must have been one passed to open_tempfile.
8132 my $fh = &callers_package($_[0]);
8134 if (defined($file = $main::open_temphandles{$fh})) {
8136 close($fh) || &error(&text("efileclose", $file, $!));
8137 delete($main::open_temphandles{$fh});
8138 return &close_tempfile($file);
8140 elsif (defined($main::open_tempfiles{$_[0]})) {
8142 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
8143 my @st = stat($_[0]);
8144 if (&is_selinux_enabled() && &has_command("chcon")) {
8145 # Set original security context
8146 system("chcon --reference=".quotemeta($_[0]).
8147 " ".quotemeta($main::open_tempfiles{$_[0]}).
8148 " >/dev/null 2>&1");
8150 my @old_attributes = &get_clear_file_attributes($_[0]);
8151 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
8153 # Set original permissions and ownership
8154 chmod($st[2], $_[0]);
8155 chown($st[4], $st[5], $_[0]);
8157 &reset_file_attributes($_[0], \@old_attributes);
8158 delete($main::open_tempfiles{$_[0]});
8159 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
8160 if ($main::open_templocks{$_[0]}) {
8161 &unlock_file($_[0]);
8162 delete($main::open_templocks{$_[0]});
8167 # Must be closing a handle not associated with a file
8173 =head2 print_tempfile(handle, text, ...)
8175 Like the normal print function, but calls &error on failure. Useful when
8176 combined with open_tempfile, to ensure that a criticial file is never
8177 only partially written.
8182 my ($fh, @args) = @_;
8183 $fh = &callers_package($fh);
8184 (print $fh @args) || &error(&text("efilewrite",
8185 $main::open_temphandles{$fh} || $fh, $!));
8188 =head2 is_selinux_enabled
8190 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
8193 sub is_selinux_enabled
8195 if (!defined($main::selinux_enabled_cache)) {
8197 if ($gconfig{'os_type'} !~ /-linux$/) {
8198 # Not on linux, so no way
8199 $main::selinux_enabled_cache = 0;
8201 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
8202 # Use global config file
8203 $main::selinux_enabled_cache =
8204 $seconfig{'SELINUX'} eq 'disabled' ||
8205 !$seconfig{'SELINUX'} ? 0 : 1;
8208 # Use selinuxenabled command
8209 #$selinux_enabled_cache =
8210 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
8211 $main::selinux_enabled_cache = 0;
8214 return $main::selinux_enabled_cache;
8217 =head2 get_clear_file_attributes(file)
8219 Finds file attributes that may prevent writing, clears them and returns them
8220 as a list. May call error. Mainly for internal use by open_tempfile and
8224 sub get_clear_file_attributes
8228 if ($gconfig{'chattr'}) {
8229 # Get original immutable bit
8230 my $out = &backquote_command(
8231 "lsattr ".quotemeta($file)." 2>/dev/null");
8233 $out =~ s/\s\S+\n//;
8234 @old_attributes = grep { $_ ne '-' } split(//, $out);
8236 if (&indexof("i", @old_attributes) >= 0) {
8237 my $err = &backquote_logged(
8238 "chattr -i ".quotemeta($file)." 2>&1");
8240 &error("Failed to remove immutable bit on ".
8245 return @old_attributes;
8248 =head2 reset_file_attributes(file, &attributes)
8250 Put back cleared attributes on some file. May call error. Mainly for internal
8251 use by close_tempfile.
8254 sub reset_file_attributes
8256 my ($file, $old_attributes) = @_;
8257 if (&indexof("i", @$old_attributes) >= 0) {
8258 my $err = &backquote_logged(
8259 "chattr +i ".quotemeta($file)." 2>&1");
8261 &error("Failed to restore immutable bit on ".
8267 =head2 cleanup_tempnames
8269 Remove all temporary files generated using transname. Typically only called
8270 internally when a Webmin script exits.
8273 sub cleanup_tempnames
8275 foreach my $t (@main::temporary_files) {
8278 @main::temporary_files = ( );
8281 =head2 open_lock_tempfile([handle], file, [no-error])
8283 Returns a temporary file for writing to some actual file, and also locks it.
8284 Effectively the same as calling lock_file and open_tempfile on the same file,
8285 but calls the unlock for you automatically when it is closed.
8288 sub open_lock_tempfile
8290 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8291 $fh = &callers_package($fh);
8292 my $lockfile = $file;
8293 $lockfile =~ s/^[^\/]*//;
8294 if ($lockfile =~ /^\//) {
8295 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8297 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8302 $main::end_exit_status ||= $?;
8303 if ($$ == $main::initial_process_id) {
8304 # Exiting from initial process
8305 &cleanup_tempnames();
8306 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8307 $main::debug_log_start_module eq &get_module_name()) {
8308 my $len = time() - $main::debug_log_start_time;
8309 &webmin_debug_log("STOP", "runtime=$len");
8310 $main::debug_log_start_time = 0;
8312 if (!$ENV{'SCRIPT_NAME'} &&
8313 $main::initial_module_name eq &get_module_name()) {
8314 # In a command-line script - call the real exit, so that the
8315 # exit status gets properly propogated. In some cases this
8316 # was not happening.
8317 exit($main::end_exit_status);
8322 =head2 month_to_number(month)
8324 Converts a month name like feb to a number like 1.
8329 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8332 =head2 number_to_month(number)
8334 Converts a number like 1 to a month name like Feb.
8339 return ucfirst($number_to_month_map{$_[0]});
8342 =head2 get_rbac_module_acl(user, module)
8344 Returns a hash reference of RBAC overrides ACLs for some user and module.
8345 May return undef if none exist (indicating access denied), or the string *
8346 if full access is granted.
8349 sub get_rbac_module_acl
8351 my ($user, $mod) = @_;
8352 eval "use Authen::SolarisRBAC";
8353 return undef if ($@);
8356 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8357 # Automagic webmin.modulename.admin authorization exists .. allow access
8359 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8360 %rv = ( 'noconfig' => 1 );
8367 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8371 my ($auths, $acls) = split(/\s+/, $_);
8372 my @auths = split(/,/, $auths);
8374 my ($merge) = ($acls =~ s/^\+//);
8376 if ($auths eq "*") {
8377 # These ACLs apply to all RBAC users.
8378 # Only if there is some that match a specific authorization
8379 # later will they be used though.
8382 # Check each of the RBAC authorizations
8383 foreach my $a (@auths) {
8384 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8389 $foundany++ if ($gotall);
8392 # Found an RBAC authorization - return the ACLs
8393 return "*" if ($acls eq "*");
8394 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8396 # Just add to current set
8397 foreach my $a (keys %acl) {
8408 return !$foundany ? undef : %rv ? \%rv : undef;
8411 =head2 supports_rbac([module])
8413 Returns 1 if RBAC client support is available, such as on Solaris.
8418 return 0 if ($gconfig{'os_type'} ne 'solaris');
8419 eval "use Authen::SolarisRBAC";
8422 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8427 =head2 supports_ipv6()
8429 Returns 1 if outgoing IPv6 connections can be made
8434 return $ipv6_module_error ? 0 : 1;
8437 =head2 use_rbac_module_acl(user, module)
8439 Returns 1 if some user should use RBAC to get permissions for a module
8442 sub use_rbac_module_acl
8444 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8445 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8446 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8447 my %access = &get_module_acl($u, $m, 1);
8448 return $access{'rbac'} ? 1 : 0;
8451 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8453 Runs some command, possibly feeding it input and capturing output to the
8454 give files or scalar references. The parameters are :
8456 =item command - Full command to run, possibly including shell meta-characters.
8458 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8460 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8462 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8464 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8466 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8471 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8472 if (&is_readonly_mode() && !$safe) {
8473 print STDERR "Vetoing command $_[0]\n";
8477 $cmd = &translate_command($cmd);
8479 # Use ` operator where possible
8480 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8481 if (!$stdin && ref($stdout) && !$stderr) {
8482 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8483 $$stdout = `$cmd 2>$null_file`;
8486 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8487 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8488 $$stdout = `$cmd 2>&1`;
8491 elsif (!$stdin && !$stdout && !$stderr) {
8492 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8493 return system("$cmd >$null_file 2>$null_file <$null_file");
8497 $| = 1; # needed on some systems to flush before forking
8498 pipe(EXECSTDINr, EXECSTDINw);
8499 pipe(EXECSTDOUTr, EXECSTDOUTw);
8500 pipe(EXECSTDERRr, EXECSTDERRw);
8502 if (!($pid = fork())) {
8506 open(STDIN, "<&EXECSTDINr");
8507 open(STDOUT, ">&EXECSTDOUTw");
8508 if (ref($stderr) && $stderr eq $stdout) {
8509 open(STDERR, ">&EXECSTDOUTw");
8512 open(STDERR, ">&EXECSTDERRw");
8519 my $fullcmd = "($cmd)";
8520 if ($stdin && !ref($stdin)) {
8521 $fullcmd .= " <$stdin";
8523 if ($stdout && !ref($stdout)) {
8524 $fullcmd .= " >$stdout";
8526 if ($stderr && !ref($stderr)) {
8527 if ($stderr eq $stdout) {
8528 $fullcmd .= " 2>&1";
8531 $fullcmd .= " 2>$stderr";
8534 if ($gconfig{'os_type'} eq 'windows') {
8538 exec("/bin/sh", "-c", $fullcmd);
8540 print "Exec failed : $!\n";
8547 # Feed input and capture output
8549 if ($stdin && ref($stdin)) {
8550 print EXECSTDINw $$stdin;
8553 if ($stdout && ref($stdout)) {
8555 while(<EXECSTDOUTr>) {
8560 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8562 while(<EXECSTDERRr>) {
8573 =head2 open_readfile(handle, file)
8575 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8576 exactly the same as Perl's open function.
8581 my ($fh, $file) = @_;
8582 $fh = &callers_package($fh);
8583 my $realfile = &translate_filename($file);
8584 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8585 return open($fh, "<".$realfile);
8588 =head2 open_execute_command(handle, command, output?, safe?)
8590 Runs some command, with the specified file handle set to either write to it if
8591 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8592 indicates if the command modifies the state of the system or not.
8595 sub open_execute_command
8597 my ($fh, $cmd, $mode, $safe) = @_;
8598 $fh = &callers_package($fh);
8599 my $realcmd = &translate_command($cmd);
8600 if (&is_readonly_mode() && !$safe) {
8601 # Don't actually run it
8602 print STDERR "vetoing command $cmd\n";
8605 return open($fh, ">$null_file");
8608 return open($fh, $null_file);
8612 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8613 if ($gconfig{'debug_what_cmd'});
8615 return open($fh, "| $cmd");
8617 elsif ($mode == 1) {
8618 return open($fh, "$cmd 2>$null_file |");
8620 elsif ($mode == 2) {
8621 return open($fh, "$cmd 2>&1 |");
8625 =head2 translate_filename(filename)
8627 Applies all relevant registered translation functions to a filename. Mostly
8628 for internal use, and typically does nothing.
8631 sub translate_filename
8633 my ($realfile) = @_;
8634 my @funcs = grep { $_->[0] eq &get_module_name() ||
8635 !defined($_->[0]) } @main::filename_callbacks;
8636 foreach my $f (@funcs) {
8638 $realfile = &$func($realfile, @{$f->[2]});
8643 =head2 translate_command(filename)
8645 Applies all relevant registered translation functions to a command. Mostly
8646 for internal use, and typically does nothing.
8649 sub translate_command
8652 my @funcs = grep { $_->[0] eq &get_module_name() ||
8653 !defined($_->[0]) } @main::command_callbacks;
8654 foreach my $f (@funcs) {
8656 $realcmd = &$func($realcmd, @{$f->[2]});
8661 =head2 register_filename_callback(module|undef, &function, &args)
8663 Registers some function to be called when the specified module (or all
8664 modules) tries to open a file for reading and writing. The function must
8665 return the actual file to open. This allows you to override which files
8666 other code actually operates on, via the translate_filename function.
8669 sub register_filename_callback
8671 my ($mod, $func, $args) = @_;
8672 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8675 =head2 register_command_callback(module|undef, &function, &args)
8677 Registers some function to be called when the specified module (or all
8678 modules) tries to execute a command. The function must return the actual
8679 command to run. This allows you to override which commands other other code
8680 actually runs, via the translate_command function.
8683 sub register_command_callback
8685 my ($mod, $func, $args) = @_;
8686 push(@main::command_callbacks, [ $mod, $func, $args ]);
8689 =head2 capture_function_output(&function, arg, ...)
8691 Captures output that some function prints to STDOUT, and returns it. Useful
8692 for functions outside your control that print data when you really want to
8693 manipulate it before output.
8696 sub capture_function_output
8698 my ($func, @args) = @_;
8699 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8700 my $old = select(SOCKET1);
8701 my @rv = &$func(@args);
8710 return wantarray ? ($out, \@rv) : $out;
8713 =head2 capture_function_output_tempfile(&function, arg, ...)
8715 Behaves the same as capture_function_output, but uses a temporary file
8716 to avoid buffer full problems.
8719 sub capture_function_output_tempfile
8721 my ($func, @args) = @_;
8722 my $temp = &transname();
8723 open(BUFFER, ">$temp");
8724 my $old = select(BUFFER);
8725 my @rv = &$func(@args);
8728 my $out = &read_file_contents($temp);
8729 &unlink_file($temp);
8730 return wantarray ? ($out, \@rv) : $out;
8733 =head2 modules_chooser_button(field, multiple, [form])
8735 Returns HTML for a button for selecting one or many Webmin modules.
8736 field - Name of the HTML field to place the module names into.
8737 multiple - Set to 1 if multiple modules can be selected.
8738 form - Index of the form on the page.
8741 sub modules_chooser_button
8743 return &theme_modules_chooser_button(@_)
8744 if (defined(&theme_modules_chooser_button));
8745 my $form = defined($_[2]) ? $_[2] : 0;
8746 my $w = $_[1] ? 700 : 500;
8748 if ($_[1] && $gconfig{'db_sizemodules'}) {
8749 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8751 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8752 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8754 return "<input type=button onClick='ifield = document.forms[$form].$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/module_chooser.cgi?multi=$_[1]&module=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
8757 =head2 substitute_template(text, &hash)
8759 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8760 the text replaces it with the value of the hash key foo. Also supports blocks
8761 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8762 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8765 sub substitute_template
8767 # Add some extra fixed parameters to the hash
8768 my %hash = %{$_[1]};
8769 $hash{'hostname'} = &get_system_hostname();
8770 $hash{'webmin_config'} = $config_directory;
8771 $hash{'webmin_etc'} = $config_directory;
8772 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8773 $hash{'webmin_var'} = $var_directory;
8775 # Add time-based parameters, for use in DNS
8776 $hash{'current_time'} = time();
8777 my @tm = localtime($hash{'current_time'});
8778 $hash{'current_year'} = $tm[5]+1900;
8779 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8780 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8781 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8782 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8783 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8785 # Actually do the substition
8787 foreach my $s (keys %hash) {
8788 next if ($s eq ''); # Prevent just $ from being subbed
8791 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8792 $rv =~ s/\$\Q$us\E/$sv/g;
8794 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8795 # and ${IF}..${ENDIF} with value
8796 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8797 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8799 # Replace $IF..$ELSE..$ENDIF block with first value,
8800 # and $IF..$ENDIF with value
8801 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8802 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8804 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8805 # matching, nothing if not
8806 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8807 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8809 # Replace $IFEQ..$ENDIFEQ block with first value if
8810 # matching, nothing if not
8811 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8812 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8815 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8816 # and ${IF}..${ENDIF} with nothing
8817 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8818 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8820 # Replace $IF..$ELSE..$ENDIF block with second value,
8821 # and $IF..$ENDIF with nothing
8822 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8823 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8825 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8826 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8827 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8831 # Now assume any $IF blocks whose variables are not present in the hash
8832 # evaluate to false.
8833 # $IF...$ELSE x $ENDIF => x
8834 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8835 # $IF...x...$ENDIF => (nothing)
8836 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8837 # ${var} => (nothing)
8838 $rv =~ s/\$\{[A-Z]+\}//g;
8843 =head2 running_in_zone
8845 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8846 disable module and features that are not appropriate, like those that modify
8847 mounted filesystems.
8852 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8853 $gconfig{'os_version'} < 10);
8854 my $zn = `zonename 2>$null_file`;
8856 return $zn && $zn ne "global";
8859 =head2 running_in_vserver
8861 Returns 1 if the current Webmin instance is running in a Linux VServer.
8862 Used to disable modules and features that are not appropriate.
8865 sub running_in_vserver
8867 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8870 open(MTAB, "/etc/mtab");
8872 my ($dev, $mp) = split(/\s+/, $_);
8873 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8882 =head2 running_in_xen
8884 Returns 1 if Webmin is running inside a Xen instance, by looking
8885 at /proc/xen/capabilities.
8890 return 0 if (!-r "/proc/xen/capabilities");
8891 my $cap = &read_file_contents("/proc/xen/capabilities");
8892 return $cap =~ /control_d/ ? 0 : 1;
8895 =head2 running_in_openvz
8897 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8898 at /proc/vz/veinfo for a non-zero line.
8901 sub running_in_openvz
8903 return 0 if (!-r "/proc/vz/veinfo");
8904 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8905 return 0 if (!$lref || !@$lref);
8906 foreach my $l (@$lref) {
8908 my @ll = split(/\s+/, $l);
8909 return 0 if ($ll[0] eq '0');
8914 =head2 list_categories(&modules, [include-empty])
8916 Returns a hash mapping category codes to names, including any custom-defined
8917 categories. The modules parameter must be an array ref of module hash objects,
8918 as returned by get_all_module_infos.
8923 my ($mods, $empty) = @_;
8924 my (%cats, %catnames);
8925 &read_file("$config_directory/webmin.catnames", \%catnames);
8926 foreach my $o (@lang_order_list) {
8927 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8932 foreach my $m (@$mods) {
8933 my $c = $m->{'category'};
8934 next if ($cats{$c});
8935 if (defined($catnames{$c})) {
8936 $cats{$c} = $catnames{$c};
8938 elsif ($text{"category_$c"}) {
8939 $cats{$c} = $text{"category_$c"};
8942 # try to get category name from module ..
8943 my %mtext = &load_language($m->{'dir'});
8944 if ($mtext{"category_$c"}) {
8945 $cats{$c} = $mtext{"category_$c"};
8948 $c = $m->{'category'} = "";
8949 $cats{$c} = $text{"category_$c"};
8956 =head2 is_readonly_mode
8958 Returns 1 if the current user is in read-only mode, and thus all writes
8959 to files and command execution should fail.
8962 sub is_readonly_mode
8964 if (!defined($main::readonly_mode_cache)) {
8965 my %gaccess = &get_module_acl(undef, "");
8966 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8968 return $main::readonly_mode_cache;
8971 =head2 command_as_user(user, with-env?, command, ...)
8973 Returns a command to execute some command as the given user, using the
8974 su statement. If on Linux, the /bin/sh shell is forced in case the user
8975 does not have a valid shell. If with-env is set to 1, the -s flag is added
8976 to the su command to read the user's .profile or .bashrc file.
8981 my ($user, $env, @args) = @_;
8982 my @uinfo = getpwnam($user);
8983 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8984 # User shell doesn't appear to be valid
8985 if ($gconfig{'os_type'} =~ /-linux$/) {
8986 # Use -s /bin/sh to force it
8987 $shellarg = " -s /bin/sh";
8989 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8990 $gconfig{'os_type'} eq 'solaris' &&
8991 $gconfig{'os_version'} >= 11 ||
8992 $gconfig{'os_type'} eq 'macos') {
8993 # Use -m and force /bin/sh
8994 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8998 my $rv = "su".($env ? " -" : "").$shellarg.
8999 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
9003 =head2 list_osdn_mirrors(project, file)
9005 This function is now deprecated in favor of letting sourceforge just
9006 redirect to the best mirror, and now just returns their primary download URL.
9009 sub list_osdn_mirrors
9011 my ($project, $file) = @_;
9012 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
9014 'mirror' => 'downloads' } );
9017 =head2 convert_osdn_url(url)
9019 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
9020 or http://prdownloads.sourceforge.net/project/file.zip , convert it
9021 to a real URL on the sourceforge download redirector.
9024 sub convert_osdn_url
9027 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
9028 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
9029 # Always use the Sourceforge mail download URL, which does
9030 # a location-based redirect for us
9031 my ($project, $file) = ($1, $2);
9032 $url = "http://prdownloads.sourceforge.net/sourceforge/".
9034 return wantarray ? ( $url, 0 ) : $url;
9037 # Some other source .. don't change
9038 return wantarray ? ( $url, 2 ) : $url;
9042 =head2 get_current_dir
9044 Returns the directory the current process is running in.
9050 if ($gconfig{'os_type'} eq 'windows') {
9063 =head2 supports_users
9065 Returns 1 if the current OS supports Unix user concepts and functions like
9066 su , getpw* and so on. This will be true on Linux and other Unixes, but false
9072 return $gconfig{'os_type'} ne 'windows';
9075 =head2 supports_symlinks
9077 Returns 1 if the current OS supports symbolic and hard links. This will not
9078 be the case on Windows.
9081 sub supports_symlinks
9083 return $gconfig{'os_type'} ne 'windows';
9086 =head2 quote_path(path)
9088 Returns a path with safe quoting for the current operating system.
9094 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
9095 # Windows only supports "" style quoting
9099 return quotemeta($path);
9103 =head2 get_windows_root
9105 Returns the base windows system directory, like c:/windows.
9108 sub get_windows_root
9110 if ($ENV{'SystemRoot'}) {
9111 my $rv = $ENV{'SystemRoot'};
9116 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
9120 =head2 read_file_contents(file)
9122 Given a filename, returns its complete contents as a string. Effectively
9123 the same as the Perl construct `cat file`.
9126 sub read_file_contents
9128 &open_readfile(FILE, $_[0]) || return undef;
9135 =head2 unix_crypt(password, salt)
9137 Performs Unix encryption on a password, using the built-in crypt function or
9138 the Crypt::UnixCrypt module if the former does not work. The salt parameter
9139 must be either an already-hashed password, or a two-character alpha-numeric
9145 my ($pass, $salt) = @_;
9146 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
9147 my $rv = eval "crypt(\$pass, \$salt)";
9149 return $rv if ($rv && !$@);
9150 eval "use Crypt::UnixCrypt";
9152 return Crypt::UnixCrypt::crypt($pass, $salt);
9155 &error("Failed to encrypt password : $err");
9159 =head2 split_quoted_string(string)
9161 Given a string like I<foo "bar baz" quux>, returns the array :
9165 sub split_quoted_string
9169 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
9170 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
9171 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
9178 =head2 write_to_http_cache(url, file|&data)
9180 Updates the Webmin cache with the contents of the given file, possibly also
9181 clearing out old data. Mainly for internal use by http_download.
9184 sub write_to_http_cache
9186 my ($url, $file) = @_;
9187 return 0 if (!$gconfig{'cache_size'});
9189 # Don't cache downloads that look dynamic
9190 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
9194 # Check if the current module should do caching
9195 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9196 # Caching all except some modules
9197 my @mods = split(/\s+/, $1);
9198 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9200 elsif ($gconfig{'cache_mods'}) {
9201 # Only caching some modules
9202 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9203 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9209 $size = length($$file);
9212 my @st = stat($file);
9216 if ($size > $gconfig{'cache_size'}) {
9217 # Bigger than the whole cache - so don't save it
9222 $cfile = "$main::http_cache_directory/$cfile";
9224 # See how much we have cached currently, clearing old files
9226 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
9227 opendir(CACHEDIR, $main::http_cache_directory);
9228 foreach my $f (readdir(CACHEDIR)) {
9229 next if ($f eq "." || $f eq "..");
9230 my $path = "$main::http_cache_directory/$f";
9231 my @st = stat($path);
9232 if ($gconfig{'cache_days'} &&
9233 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9234 # This file is too old .. trash it
9239 push(@cached, [ $path, $st[7], $st[9] ]);
9243 @cached = sort { $a->[2] <=> $b->[2] } @cached;
9244 while($total+$size > $gconfig{'cache_size'} && @cached) {
9245 # Cache is too big .. delete some files until the new one will fit
9246 unlink($cached[0]->[0]);
9247 $total -= $cached[0]->[1];
9251 # Finally, write out the new file
9253 &open_tempfile(CACHEFILE, ">$cfile");
9254 &print_tempfile(CACHEFILE, $$file);
9255 &close_tempfile(CACHEFILE);
9258 my ($ok, $err) = ©_source_dest($file, $cfile);
9264 =head2 check_in_http_cache(url)
9266 If some URL is in the cache and valid, return the filename for it. Mainly
9267 for internal use by http_download.
9270 sub check_in_http_cache
9273 return undef if (!$gconfig{'cache_size'});
9275 # Check if the current module should do caching
9276 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9277 # Caching all except some modules
9278 my @mods = split(/\s+/, $1);
9279 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9281 elsif ($gconfig{'cache_mods'}) {
9282 # Only caching some modules
9283 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9284 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9289 $cfile = "$main::http_cache_directory/$cfile";
9290 my @st = stat($cfile);
9291 return undef if (!@st || !$st[7]);
9292 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9297 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9302 =head2 supports_javascript
9304 Returns 1 if the current browser is assumed to support javascript.
9307 sub supports_javascript
9309 if (defined(&theme_supports_javascript)) {
9310 return &theme_supports_javascript();
9312 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9315 =head2 get_module_name
9317 Returns the name of the Webmin module that called this function. For internal
9318 use only by other API functions.
9323 return &get_module_variable('$module_name');
9326 =head2 get_module_variable(name, [ref])
9328 Returns the value of some variable which is set in the caller's context, if
9329 using the new WebminCore package. For internal use only.
9332 sub get_module_variable
9334 my ($v, $wantref) = @_;
9335 my $slash = $wantref ? "\\" : "";
9336 my $thispkg = &web_libs_package();
9337 if ($thispkg eq 'WebminCore') {
9338 my ($vt, $vn) = split('', $v, 2);
9340 for(my $i=0; ($callpkg) = caller($i); $i++) {
9341 last if ($callpkg ne $thispkg);
9343 return eval "${slash}${vt}${callpkg}::${vn}";
9345 return eval "${slash}${v}";
9348 =head2 clear_time_locale()
9350 Temporarily force the locale to C, until reset_time_locale is called. This is
9351 useful if your code is going to call C<strftime> from the POSIX package, and
9352 you want to ensure that the output is in a consistent format.
9355 sub clear_time_locale
9357 if ($main::clear_time_locale_count == 0) {
9360 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9361 POSIX::setlocale(POSIX::LC_TIME, "C");
9364 $main::clear_time_locale_count++;
9367 =head2 reset_time_locale()
9369 Revert the locale to whatever it was before clear_time_locale was called
9372 sub reset_time_locale
9374 if ($main::clear_time_locale_count == 1) {
9376 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9377 $main::clear_time_locale_old = undef;
9380 $main::clear_time_locale_count--;
9383 =head2 callers_package(filehandle)
9385 Convert a non-module filehandle like FOO to one qualified with the
9386 caller's caller's package, like fsdump::FOO. For internal use only.
9392 my $callpkg = (caller(1))[0];
9393 my $thispkg = &web_libs_package();
9394 if (!ref($fh) && $fh !~ /::/ &&
9395 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9396 $fh = $callpkg."::".$fh;
9401 =head2 web_libs_package()
9403 Returns the package this code is in. We can't always trust __PACKAGE__. For
9407 sub web_libs_package
9409 if ($called_from_webmin_core) {
9410 return "WebminCore";
9415 =head2 get_userdb_string
9417 Returns the URL-style string for connecting to the users and groups database
9420 sub get_userdb_string
9422 return undef if ($main::no_miniserv_userdb);
9424 &get_miniserv_config(\%miniserv);
9425 return $miniserv{'userdb'};
9428 =head2 connect_userdb(string)
9430 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9431 On failure returns an error message string. In an array context, returns the
9438 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9439 if ($proto eq "mysql") {
9440 # Connect to MySQL with DBI
9441 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9442 $drh || return $text{'sql_emysqldriver'};
9443 my ($host, $port) = split(/:/, $host);
9444 my $cstr = "database=$prefix;host=$host";
9445 $cstr .= ";port=$port" if ($port);
9446 my $dbh = $drh->connect($cstr, $user, $pass, { });
9447 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9448 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9450 elsif ($proto eq "postgresql") {
9451 # Connect to PostgreSQL with DBI
9452 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9453 $drh || return $text{'sql_epostgresqldriver'};
9454 my ($host, $port) = split(/:/, $host);
9455 my $cstr = "dbname=$prefix;host=$host";
9456 $cstr .= ";port=$port" if ($port);
9457 my $dbh = $drh->connect($cstr, $user, $pass);
9458 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9459 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9461 elsif ($proto eq "ldap") {
9462 # Connect with perl LDAP module
9463 eval "use Net::LDAP";
9464 $@ && return $text{'sql_eldapdriver'};
9465 my ($host, $port) = split(/:/, $host);
9466 my $scheme = $args->{'scheme'} || 'ldap';
9468 $port = $scheme eq 'ldaps' ? 636 : 389;
9470 my $ldap = Net::LDAP->new($host,
9472 'scheme' => $scheme);
9473 $ldap || return &text('sql_eldapconnect', $host);
9475 if ($args->{'tls'}) {
9476 # Switch to TLS mode
9477 eval { $mesg = $ldap->start_tls(); };
9478 if ($@ || !$mesg || $mesg->code) {
9479 return &text('sql_eldaptls',
9480 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9483 # Login to the server
9485 $mesg = $ldap->bind(dn => $user, password => $pass);
9488 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9490 if (!$mesg || $mesg->code) {
9491 return &text('sql_eldaplogin', $user,
9492 $mesg ? $mesg->error : "Unknown error");
9494 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9497 return "Unknown protocol $proto";
9501 =head2 disconnect_userdb(string, &handle)
9503 Closes a handle opened by connect_userdb
9506 sub disconnect_userdb
9509 if ($str =~ /^(mysql|postgresql):/) {
9511 if (!$h->{'AutoCommit'}) {
9516 elsif ($str =~ /^ldap:/) {
9523 =head2 split_userdb_string(string)
9525 Converts a string like mysql://user:pass@host/db into separate parts
9528 sub split_userdb_string
9531 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9532 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9533 ($1, $2, $3, $4, $5, $7);
9534 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9535 return ($proto, $user, $pass, $host, $prefix, \%args);
9540 $done_web_lib_funcs = 1;